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公开(公告)号：US08223906B2
公开(公告)日：2012-07-17
申请号：US12197234
申请日：2008-08-23
CPC分类号： H04L27/2647 , H04L27/2626
摘要： A transmit filter for a stream of OFDM symbols has a remapper, Infinite Impulse Response (IIR) filter and a controller, the transmit filter operating on a stream of OFDM symbols. The transmit filter accepts symbols to be transmitted, the re-mapper re-orders them, the IIR filters the re-ordered stream, and a controller provides an output by rearranging the filtered symbols. The incoming symbol stream contains a series of symbols, each followed by a guard interval, where each guard interval has a first Tg symbol interval, and a second Tg symbol interval, the remapper generating a re-ordered stream having a first Tg symbol interval, a second Tg symbol interval and the symbol, the output of the IIR filter thereby generating a filtered first Tg symbol, a filtered second Tg symbol, and a filtered symbol, and the controller forms the transmit output by discarding the filtered first Tg symbol and outputting, in sequence, the filtered second Tg symbol, the filtered symbol, and a copy of the filtered second Tg symbol. The filtered second Tg symbol may be saved into a local buffer at the time it is initially output for use following the current symbol.
摘要翻译： 用于OFDM符号流的发射滤波器具有再映射器，无限脉冲响应（IIR）滤波器和控制器，所述发射滤波器在OFDM符号流上操作。 发送过滤器接受要发送的符号，重新映射器重新命令它们，IIR对重新排序的流进行滤波，并且控制器通过重排排序的滤波符号来提供输出。 输入符号流包含一系列符号，每个符号后面是保护间隔，其中每个保护间隔具有第一Tg符号间隔和第二Tg符号间隔，再生映射器产生具有第一Tg符号间隔的重排序流， 第二Tg符号间隔和符号，IIR滤波器的输出，从而产生滤波后的第一Tg符号，滤波后的第二Tg符号和滤波符号，并且控制器通过丢弃滤波后的第一Tg符号并输出 按照顺序，滤波后的第二Tg符号，滤波后的符号和滤波的第二Tg符号的副本。 经滤波的第二Tg符号可以在其最初输出之后被保存到本地缓冲器中以便在当前符号之后使用。
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公开(公告)号：US20100046648A1
公开(公告)日：2010-02-25
申请号：US12197234
申请日：2008-08-23
CPC分类号： H04L27/2647 , H04L27/2626
摘要： A filter for receiver and operative on a stream of OFDM symbols has a symbol timing identifier which indicates the time interval for each symbol and also indicates a non-truncation interval and a truncation interval of the stream of symbols. The stream of OFDM symbols is applied to an infinite impulse response (IIR) filter with a reset input for resetting internal registers such that during the non-truncation interval, the reset input is not asserted, and during the truncation interval of the stream of OFDM symbols, the reset input is asserted during the intervals between symbols, as identified by the symbol timing identifier.A transmit filter for a stream of OFDM symbols, each symbol being separated into a first Tg interval, a second Tg interval, a symbol interval, and a final Tg interval, the filter has a stream modifier which discards the first Tg interval, accepts said second Tg interval, accepts the symbol interval and discards said final Tg interval, presenting to an infinite impulse response filter, in sequence, the second Tg interval, the symbol interval and the second Tg interval.
摘要翻译： 用于接收机并在OFDM符号流上操作的滤波器具有指示每个符号的时间间隔的符号定时标识符，并且还指示符号流的非截断间隔和截断间隔。 OFDM符号流被应用于具有用于复位内部寄存器的复位输入的无限脉冲响应（IIR）滤波器，使得在非截断间隔期间，复位输入不被断言，并且在OFDM的流的截断间隔期间 在由符号定时标识符识别的符号之间的间隔期间，复位输入被断言。 一种用于OFDM符号流的发射滤波器，每个符号被分成第一Tg间隔，第二Tg间隔，符号间隔和最终Tg间隔，滤波器具有丢弃第一Tg间隔的流修改器，接受所述 第二Tg间隔接受符号间隔并丢弃所述最终Tg间隔，依次呈现无限脉冲响应滤波器，第二Tg间隔，符号间隔和第二Tg间隔。
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公开(公告)号：US08165251B2
公开(公告)日：2012-04-24
申请号：US12197230
申请日：2008-08-23
IPC分类号： H04B1/10
CPC分类号： H04L27/2647 , H04L27/2626
摘要： A filter for receiver and operative on a stream of OFDM symbols has a symbol timing identifier which indicates the time interval for each symbol and also indicates a non-truncation interval and a truncation interval of the stream of symbols. The stream of OFDM symbols is applied to an infinite impulse response (IIR) filter with a reset input for resetting internal registers such that during the non-truncation interval, the reset input is not asserted, and during the truncation interval of the stream of OFDM symbols, the reset input is asserted during the intervals between symbols, as identified by the symbol timing identifier.A transmit filter for a stream of OFDM symbols, each symbol being separated into a first Tg interval, a second Tg interval, a symbol interval, and a final Tg interval, the filter has a stream modifier which discards the first Tg interval, accepts said second Tg interval, accepts the symbol interval and discards said final Tg interval, presenting to an infinite impulse response filter, in sequence, the second Tg interval, the symbol interval and the second Tg interval.
摘要翻译： 用于接收机并在OFDM符号流上操作的滤波器具有指示每个符号的时间间隔的符号定时标识符，并且还指示符号流的非截断间隔和截断间隔。 OFDM符号流被应用于具有用于复位内部寄存器的复位输入的无限脉冲响应（IIR）滤波器，使得在非截断间隔期间，复位输入不被断言，并且在OFDM的流的截断间隔期间 在由符号定时标识符识别的符号之间的间隔期间，复位输入被断言。 一种用于OFDM符号流的发射滤波器，每个符号被分成第一Tg间隔，第二Tg间隔，符号间隔和最终Tg间隔，滤波器具有丢弃第一Tg间隔的流修改器，接受所述 第二Tg间隔接受符号间隔并丢弃所述最终Tg间隔，依次呈现无限脉冲响应滤波器，第二Tg间隔，符号间隔和第二Tg间隔。
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公开(公告)号：US08160190B2
公开(公告)日：2012-04-17
申请号：US12197229
申请日：2008-08-22
IPC分类号： H04B1/10
CPC分类号： H04L27/2626 , H04L27/2647
摘要： A receive filter for a stream of OFDM symbols has an infinite impulse response (IIR) filter which receives packets having a preamble part followed by a data part, the data part having a succession of cyclic prefixes followed by OFDM symbols. The packet is provided to the IIR filter, and the registers of the IIR filter are reset before or during each cyclic prefix. The IIR filter may be formed from registers which are coupled to return a value to a predecessor register, or as an array of registers, such as in a BIQUAD configuration, where the registers are reset by a shared reset signal.
摘要翻译： 用于OFDM符号流的接收滤波器具有无限脉冲响应（IIR）滤波器，其接收具有后继数据部分的前导码部分的分组，该数据部分具有随后是OFDM符号的一系列循环前缀。 该分组被提供给IIR滤波器，并且IIR滤波器的寄存器在每个循环前缀之前或期间被复位。 IIR滤波器可以由寄存器形成，寄存器被耦合以将值返回到前驱寄存器，或者作为诸如在BIQUAD配置中的寄存器阵列，其中寄存器被共享复位信号复位。
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公开(公告)号：US20100046647A1
公开(公告)日：2010-02-25
申请号：US12197232
申请日：2008-08-23
CPC分类号： H04L27/2626 , H04L27/2647
摘要： A filter for receiver and operative on a stream of OFDM symbols has a symbol timing identifier which indicates the time interval for each symbol and also indicates a non-truncation interval and a truncation interval of the stream of symbols. The stream of OFDM symbols is applied to an infinite impulse response (IIR) filter with a reset input for resetting internal registers such that during the non-truncation interval, the reset input is not asserted, and during the truncation interval of the stream of OFDM symbols, the reset input is asserted during the intervals between symbols, as identified by the symbol timing identifier.A transmit filter for a stream of OFDM symbols, each symbol being separated into a first Tg interval, a second Tg interval, a symbol interval, and a final Tg interval, the filter has a stream modifier which discards the first Tg interval, accepts said second Tg interval, accepts the symbol interval and discards said final Tg interval, presenting to an infinite impulse response filter, in sequence, the second Tg interval, the symbol interval and the second Tg interval.
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公开(公告)号：US08155220B2
公开(公告)日：2012-04-10
申请号：US12197232
申请日：2008-08-23
CPC分类号： H04L27/2626 , H04L27/2647
摘要： A transmit filter for a stream of OFDM symbols has a remapper, Infinite Impulse Response (IIR) filter and a controller, the transmit filter operating on a stream of OFDM symbols. The transmit filter accepts symbols to be transmitted, the re-mapper re-orders them, the IIR filters the re-ordered stream, and a controller provides an output by rearranging the filtered symbols. The incoming symbol stream contains a series of symbols, each followed by a guard interval, where each guard interval has a first Tg symbol interval, and a second Tg symbol interval, the remapper generating a re-ordered stream having a first Tg symbol interval, a second Tg symbol interval and the symbol, the output of the IIR filter thereby generating a filtered first Tg symbol, a filtered second Tg symbol, and a filtered symbol, and the controller forms the transmit output by discarding the filtered first Tg symbol and outputting, in sequence, the filtered second Tg symbol, the filtered symbol, and a copy of the filtered second Tg symbol. The filtered second Tg symbol may be saved into a local buffer at the time it is initially output for use following the current symbol.
摘要翻译： 用于OFDM符号流的发射滤波器具有再映射器，无限脉冲响应（IIR）滤波器和控制器，所述发射滤波器在OFDM符号流上操作。 发送过滤器接受要发送的符号，重新映射器重新命令它们，IIR对重新排序的流进行滤波，并且控制器通过重排排序的滤波符号来提供输出。 输入符号流包含一系列符号，每个符号后面是保护间隔，其中每个保护间隔具有第一Tg符号间隔和第二Tg符号间隔，再生映射器产生具有第一Tg符号间隔的重排序流， 第二Tg符号间隔和符号，IIR滤波器的输出，从而产生滤波后的第一Tg符号，滤波后的第二Tg符号和滤波符号，并且控制器通过丢弃滤波后的第一Tg符号并输出 按照顺序，滤波后的第二Tg符号，滤波后的符号和滤波的第二Tg符号的副本。 经滤波的第二Tg符号可以在其最初输出之后被保存到本地缓冲器中以便在当前符号之后使用。
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公开(公告)号：US20100046645A1
公开(公告)日：2010-02-25
申请号：US12197229
申请日：2008-08-22
CPC分类号： H04L27/2626 , H04L27/2647
摘要： A filter for receiver and operative on a stream of OFDM symbols has a symbol timing identifier which indicates the time interval for each symbol and also indicates a non-truncation interval and a truncation interval of the stream of symbols. The stream of OFDM symbols is applied to an infinite impulse response (IIR) filter with a reset input for resetting internal registers such that during the non-truncation interval, the reset input is not asserted, and during the truncation interval of the stream of OFDM symbols, the reset input is asserted during the intervals between symbols, as identified by the symbol timing identifier.A transmit filter for a stream of OFDM symbols, each symbol being separated into a first Tg interval, a second Tg interval, a symbol interval, and a final Tg interval, the filter has a stream modifier which discards the first Tg interval, accepts said second Tg interval, accepts the symbol interval and discards said final Tg interval, presenting to an infinite impulse response filter, in sequence, the second Tg interval, the symbol interval and the second Tg interval.
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公开(公告)号：US20100046646A1
公开(公告)日：2010-02-25
申请号：US12197230
申请日：2008-08-23
CPC分类号： H04L27/2647 , H04L27/2626
摘要： A filter for receiver and operative on a stream of OFDM symbols has a symbol timing identifier which indicates the time interval for each symbol and also indicates a non-truncation interval and a truncation interval of the stream of symbols. The stream of OFDM symbols is applied to an infinite impulse response (IIR) filter with a reset input for resetting internal registers such that during the non-truncation interval, the reset input is not asserted, and during the truncation interval of the stream of OFDM symbols, the reset input is asserted during the intervals between symbols, as identified by the symbol timing identifier.A transmit filter for a stream of OFDM symbols, each symbol being separated into a first Tg interval, a second Tg interval, a symbol interval, and a final Tg interval, the filter has a stream modifier which discards the first Tg interval, accepts said second Tg interval, accepts the symbol interval and discards said final Tg interval, presenting to an infinite impulse response filter, in sequence, the second Tg interval, the symbol interval and the second Tg interval.
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9.发明授权Analog to digital converter bit width and gain controller for a wireless receiver 有权用于无线接收器的模数转换器位宽和增益控制器公开(公告)号：US08073085B1
公开(公告)日：2011-12-06
申请号：US11825832
申请日：2007-07-07
IPC分类号： H04L27/08
CPC分类号： H04L27/2647 , H04L27/2613
摘要： A gain controller for a wireless communication system sets the receiver gain during the initial time duration of a preamble, and for each subsequent symbol computes a new gain value, which is applied at the end of each symbol. An analog to digital converter resolution controller sets the resolution of the ADC to a high resolution during a preamble interval and a first symbol interval, and to a comparatively lower resolution thereafter until the end of the frame. When a new zone is entered, the first symbol of the new zone is sampled at a higher resolution than the subsequent symbols.
摘要翻译： 用于无线通信系统的增益控制器在前导码的初始持续时间期间设置接收机增益，并且对于每个后续符号计算在每个符号的末尾应用的新的增益值。 模数转换器分辨率控制器在前导码间隔和第一符号间隔期间将ADC的分辨率设置为高分辨率，并且之后到相对较低的分辨率直到帧结束。 当输入新区域时，新区域的第一个符号以比后续符号更高的分辨率进行采样。
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公开(公告)号：US20100138632A1
公开(公告)日：2010-06-03
申请号：US12327395
申请日：2008-12-03
申请人： Phanimithra Gangalakurti , Karthik Vaidyanathan , Partha Sarathy Murali , InduShekhar Ayyalasomayajula
发明人： Phanimithra Gangalakurti , Karthik Vaidyanathan , Partha Sarathy Murali , InduShekhar Ayyalasomayajula
CPC分类号： G06F7/4818
摘要： A CORDIC processor has a plurality of stages, each of the stages having a X input, Y input, a sign input, a sign output, an X output, a Y output, a mode control input having a ROTATE or VECTOR value, and a stage number k input, each CORDIC stage having a first shift generating an output by shifting the Y input k times, a second shift generating an output by shifting X input k times, a multiplexer having an output coupled to the sign input when the mode control input is ROTATE and to the sign of the Y input when the mode input is VECTOR, a first multiplier forming the product of the first shift output and the multiplexer output, a second multiplier forming the product of the second shift output and an inverted the multiplexer output, a first adder forming the X output from the sum of the first multiplier output and the X input, and a second adder forming the Y output from the sum of the second multiplier output and the Y input.
摘要翻译： CORDIC处理器具有多个级，每个级具有X输入，Y输入，符号输入，符号输出，X输出，Y输出，具有ROTATE或VECTOR值的模式控制输入，以及 每个CORDIC级具有通过移位Y输入k次而产生输出的第一移位，通过移位X个输入k次来产生输出的第二移位;当模式控制时，具有耦合到符号输入的输出的多路复用器 当模式输入为VECTOR时，输入为ROTATE和Y输入的符号，形成第一移位输出和多路复用器输出的乘积的第一乘法器，形成第二移位输出和反相多路复用器的乘积的第二乘法器 输出，从第一乘法器输出和X输入的和形成X输出的第一加法器和从第二乘法器输出和Y输入的和形成Y输出的第二加法器。
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