摘要:
A transmission method executed in a multiple input multiple output wireless communication system may include the following steps: receiving a transmitting bit sequence; providing an X level pulse amplitude modulation (X-PAM) signal set, wherein distances between any two adjacent signal points in the X-PAM are the same; generating M signal sets according to the X-PAM signal set, wherein the ith signal set is formed by multiplying the X-PAM signal set with a parameter (1/X)(i-1), wherein i is an integer from 1 to M, and generating a X-PAM signal set joint coding/decoding table according a superposition result of the M signal sets; generating M transmitting bit sub-sequences according to the transmitting bit sequence; generating M transmitting signals according to the M transmitting bit sub-sequences and the X-PAM signal set joint coding/decoding table; transmitting the M transmitting signals to a wireless transmission channel via M transmitting antennae.
摘要:
A transmission method executed in a multiple input multiple output wireless communication system may include the following steps: receiving a transmitting bit sequence; providing an X level pulse amplitude modulation (X-PAM) signal set, wherein distances between any two adjacent signal points in the X-PAM are the same; generating M signal sets according to the X-PAM signal set, wherein the ith signal set is formed by multiplying the X-PAM signal set with a parameter (1/X)(i−1), wherein i is an integer from 1 to M, and generating a X-PAM signal set joint coding/decoding table according a superposition result of the M signal sets; generating M transmitting bit sub-sequences according to the transmitting bit sequence; generating M transmitting signals according to the M transmitting bit sub-sequences and the X-PAM signal set joint coding/decoding table; transmitting the M transmitting signals to a wireless transmission channel via M transmitting antennae.
摘要:
An ultra-wideband (UWB) transceiver for use in UWB communication includes a voltage-controlled oscillator (VCO) configured to periodically and sequentially generate a series of base frequencies based on a predetermined sequence and a waveform generator to generate carrier waves based on the generated base frequencies.
摘要:
A communication system comprising a channel encoder to generate a binary bit stream, a mapping unit coupled to the channel encoder, the mapping unit configured to receive the binary bit stream from the channel encoder and to map every “n” consecutive bits of the binary bit stream into a symbol in accordance with a mapping table, wherein the symbol has a symbol value related to a modulation mode, “n” being a positive integer, and a number of “m” modulation units coupled to the mapping unit, “m” being a positive integer, the modulation units configured to receive a set of “m” symbols from the mapping unit and modulate the set of “m” symbols based on the modulation mode, wherein a combined value of the symbol values of the set of “m” symbols from the mapping unit is distinguishable from another combined value of the symbol values of another set of “m” symbols from the mapping unit, and wherein a combined value of the symbol values of a set of “m” symbols from the mapping unit corresponds to a distinguishable bit value of the “n” consecutive bits in the binary bit stream.
摘要:
An ultra-wideband (UWB) transceiver for use in UWB communication includes a voltage-controlled oscillator (VCO) configured to periodically and sequentially generate a series of base frequencies based on a predetermined sequence and a waveform generator to generate carrier waves based on the generated base frequencies.
摘要:
A communications system that comprises a channel encoder for encoding a plurality of information bits, a mapping unit coupled to the channel encoder for mapping the plurality of information bits into a first set of quadrature phase shift keying (QPSK) symbols and a second set of QPSK symbols, wherein every successive predetermined number of information bits are mapped to a first QPSK symbol and a second QPSK symbol in one symbol period in accordance with a mapping table, a first modulation unit coupled to the mapping unit for converting the first QPSK symbol into a first QPSK constellation symbol, and a second modulation coupled to the mapping unit for converting the second QPSK symbol into a second QPSK constellation symbol.
摘要:
A memory device with composite contact plug and method for manufacturing the same. The composite contact plug comprises a first insulating layer deposited on a semiconductor substrate. A contact hole is formed to penetrate through the first insulation layer. A barrier layer is deposited in the contact hole and fills a portion of the contact hole. A contact plug is formed on the barrier layer and fills the contact hole. The first insulating layer is etched back until the surface of the first insulating layer is below the contact plug. A diffusion barrier layer is then deposited on the first insulating layer and the contact plug. The diffusion barrier layer is planarized until the contact plug is exposed to form a composite contact plug. The memory device is constructed on the composite contact plug.
摘要:
A female socket for power cord, including a plug terminal and an integrally formed jack body, the jack body comprises of an interconnecting piece of terminal hole, the matrix extended from the interconnecting piece and a side cover connected to the lateral margin of the matrix and buckled with the matrix. There is a scab on the matrix, there is a trip on said scab, there is a blocking part matching the trip on the inner wall of the side cover, there is a tenon on the side cover, and there is a tenon hole matching the tenon on the lateral margin of the matrix.
摘要:
A signal splitter includes a low-pass filter circuit for permitting a low-frequency component of an incoming signal in an incoming telephone line coupled to a first connecting port to pass therethrough to a second connecting port, and a coupling circuit including a capacitor coupled between a first terminal of the first connecting port and a second terminal of the second connecting port, and a coupling transformer having a primary winding that interconnects the first terminal of the first connecting port and a first input end of the low-pass filter circuit, and a secondary winding that interconnects the second terminal of the second connecting port and a second output end of the low-pass filter circuit.
摘要:
A signal splitter includes a low-pass filter circuit for permitting a low-frequency component of an incoming signal in an incoming telephone line coupled to a first connecting port to pass therethrough to a second connecting port, and a coupling circuit including a capacitor coupled between a first terminal of the first connecting port and a second terminal of the second connecting port, and a coupling transformer having a primary winding that interconnects the first terminal of the first connecting port and a first input end of the low-pass filter circuit, and a secondary winding that interconnects the second terminal of the second connecting port and a second output end of the low-pass filter circuit.