摘要:
System for ultra-wideband communications providing high data rates over an extended operating range in the presence of interferers. A preferred embodiment comprises an ultra-wideband (UWB) device that makes use of a portion of the UWB frequency range to help provide good performance in the presence of interferers. Additionally, since only a portion of the UWB frequency range is used, multiple devices can simultaneously transmit and receive by using different portions of the UWB frequency range.
摘要:
A radio receiver 102 is provided. The radio receiver 102 comprises one or more data Fast Fourier Transformers, each data Fast Fourier Transformer operable to perform a Fast Fourier Transform on an input data block, one or more impulse response Fast Fourier Transformers, each impulse response Fast Fourier Transformer operable to perform a Fast Fourier Transform on a channel impulse response, one or more multiplier components operable to multiply a term of the output of one of the data Fast Fourier Transformers by a term of the output of one of the impulse response Fast Fourier Transformers, and one or more Inverse Fast Fourier Transformers, each Inverse Fast Fourier Transformer operable to perform an Inverse Fast Fourier Transform based on an output of one or more of the multipliers.
摘要:
The present invention provides a method of operating a base station transmitter. The method includes providing a cellular downlink synchronization signal having primary and secondary portions, wherein the primary portion employs a corresponding one of a plurality of different primary signals allocated to adjoining transmission cells. The method also includes further providing cell-specific information in the secondary portion and transmitting the cellular downlink synchronization signal. In one embodiment, the primary portion explicitly indicates a partial cell identification information and the remaining cell identification information is carried in the secondary portion. In another embodiment, the plurality of different primary signals are simply used to avoid the channel mismatch effect. The present invention also provides a method of operating user equipment. The method includes receiving a cellular downlink synchronization signal having primary and secondary portions wherein the timing acquisition is performed in conjunction with the primary synchronization sequence index detection via the primary portion. In addition, the secondary portion provides cell-specific parameters and identifying and extracting the secondary portion.
摘要:
The present invention provides a receiver. In one embodiment, the receiver includes a receive portion employing transmission signals from a transmitter having multiple antennas and capable of providing channel estimates. The receiver also includes a feedback generator portion configured to provide to the transmitter a pre-coder selection for data transmission that is based on the channel estimates, wherein the pre-coder selection corresponds to a grouping of frequency-domain resource blocks. The present invention also provides a transmitter having multiple antennas. In one embodiment, the transmitter includes a transmit portion coupled to the multiple antennas and capable of applying pre-coding to a data transmission for a receiver. The transmitter also includes a feedback decoding portion configured to decode a pre-coder selection for the data transmission that is fed back from the receiver, wherein the pre-coder selection corresponds to a grouping of frequency-domain resource blocks.
摘要:
Closed loop multiple-antenna wireless communications system with antenna weights determined by maximizing a composite channel signal-to-interference-plus-noise ratio minimum. Multiplexed symbol streams over subsets of antennas enhance throughput.
摘要:
A method of operating a wireless communications unit (UE) to request a connection with a base station (10) is disclosed. The wireless unit (UE) receives a signal from the base station (10) indicating at least one time slot within which a preamble may be transmitted by the wireless communications unit (UE). The wireless unit (UE) selects one of a plurality of orthogonal codes (hi) for the preamble and generates a spread code using the selected orthogonal code. The spread code (70) is arranged as a symbol (hi) of the selected code, repeated a selected number of repetitions. The wireless unit (UE) transmits the preamble signal corresponding to the spread code to the base station (10).
摘要翻译:公开了一种操作无线通信单元(UE)以请求与基站(10)的连接的方法。 无线单元(UE)从基站(10)接收指示无线通信单元(UE)可以在其内发送前导码的至少一个时隙的信号。 无线单元(UE)为前导码选择多个正交码中的一个,并使用所选择的正交码产生扩展码。 扩展码(70)被布置为所选码的符号(h i i i),重复所选择的重复次数。 无线单元(UE)向基站(10)发送对应于扩展码的前同步码信号。
摘要:
A wireless communication system. The system comprises transmitter circuitry (BST1), the transmitter circuitry comprising encoder circuitry (50) for transmitting a plurality of frames (FR). Each of the plurality of frames comprises a primary synchronization code (PCS) and a secondary synchronization code (SSC). The encoder circuitry comprises of circuitry (501) for providing the primary synchronization code in response to a first sequence (32). The encoder circuitry further comprises circuitry (502) for providing the secondary synchronization code in response to a second sequence (54) and a third sequence (56). The second sequence is selected from a plurality of sequences. Each of the plurality of sequences is orthogonal with respect to all other sequences in the plurality of sequences. The third sequence comprises a subset of bits from the first sequence.
摘要:
A circuit for processing binary sequences is designed with a plurality of stages (530–534) coupled to provide plural signal paths (526,528). Each stage includes respective signal paths (550,562) for a first Ra1(k) and a second Rb1(k) data sequence. Each stage further includes a respective delay circuit (502) having a different delay from said respective delay circuit of each other stage (504,506) of the plurality of stages. A stage having a greatest delay (502) precedes other stages (504,506) in the plurality of stages of at least one of the plural signal paths.
摘要翻译:用于处理二进制序列的电路被设计成具有耦合以提供多个信号路径(526,528)的多个级(530-534)。 每个级包括用于第一个R a 1(k)和第二个R b个SUP(1)的相应信号路径(550,562) SUP(k)数据序列。 每个级还包括相应的延迟电路(502),其具有与多个级的每个其它级(504,506)的所述相应延迟电路不同的延迟。 具有最大延迟(502)的级在多个信号路径中的至少一个的多个级中的其他级(504,506)之前。
摘要:
A circuit is designed with a measurement circuit (432). The measurement circuit is coupled to receive a first input signal (903) from a first antenna (128) of a transmitter and coupled to receive a second input signal (913) from a second antenna (130) of the transmitter. Each of the first and second signals is transmitted at a first time. The measurement circuit produces an output signal corresponding to a magnitude of the first and second signals. A control circuit (430) is coupled to receive the output signal and a reference signal. The control circuit is arranged to produce a control signal at a second time in response to a comparison of the output signal and the reference signal.
摘要:
A method of operating a communication circuit comprises the steps of receiving a plurality of signals (508-509, 514-516) from a plurality of remote transmitters (502-506) and determining which of the plurality of remote transmitters use transmit diversity. A signal strength of each respective signal of the plurality of signals is calculated. One of the remote transmitters is selected in response to the steps of determining and calculating.