摘要:
A method and apparatus for deinterleaving in a communication system is disclosed. The method and apparatus deinterleave data units using a data deinterleaver; compressed deinterleave input symbol quality information (SQI) units using a compressed deinterleaver, wherein at least one of the input SQI units deinterleaved by the compressed deinterleaver corresponds to at least one of the plurality of data units deinterleaved by the data deinterleaver; and apply the deinterleaved SQI units to the corresponding deinterleaved data units.
摘要:
An adaptive known signal canceller comprising of a known signal canceller filter responsive to a known signal including a known portion of a transmitted signal, the known signal canceller filter operative to generate a filtered known signal, and a subtractor unit responsive to an input signal and operative to generate an output signal, the subtractor unit configured to subtract the filtered known signal from the input signal to generate an output signal, such that the known portion of the transmitted signal is substantially removed from the input signal. The adaptive known signal canceller further comprising of a known signal canceller update unit, responsive to a desired signal and an output signal and operative to continually adjust the coefficients of the known signal canceller filter based on the difference between the output signal and the desired signal, so that the filter coefficients substantially reflect the impulse response of a channel.
摘要:
A method and apparatus for deinterleaving in a communication system is disclosed. The method and apparatus deinterleave data units using a data deinterleaver; compressed deinterleave input symbol quality information (SQI) units using a compressed deinterleaver, wherein at least one of the input SQI units deinterleaved by the compressed deinterleaver corresponds to at least one of the plurality of data units deinterleaved by the data deinterleaver; and apply the deinterleaved SQI units to the corresponding deinterleaved data units.
摘要:
An adaptive known signal canceller comprising of a known signal canceller filter responsive to a known signal including a known portion of a transmitted signal, the known signal canceller filter operative to generate a filtered known signal, and a subtractor unit responsive to an input signal and operative to generate an output signal, the subtractor unit configured to subtract the filtered known signal from the input signal to generate an output signal, such that the known portion of the transmitted signal is substantially removed from the input signal. The adaptive known signal canceller further comprising of a known signal canceller update unit, responsive to a desired signal and an output signal and operative to continually adjust the coefficients of the known signal canceller filter based on the difference between the output signal and the desired signal, so that the filter coefficients substantially reflect the impulse response of a channel.
摘要:
In accordance with a method and apparatus of the present invention, a timing recovery device is disclosed to include a timing correction module responsive to a sampled input signal and adapted to generate a time-corrected signal and to further include a linear predictor coupled to the timing correction module for filtering the time-corrected signal to generate a whitened output signal and to further include a timing update module responsive to the whitened output signal for updating at least one parameter in the timing correction module.
摘要:
An extended deinterleaver the extended deinterleaver being responsive to at least one input signal, comprised of codewords, and operative to generate a deinterleaved output signal. The extended deinterleaver comprising a storage space organized into B number of appended storage branches, at least one appended storage branch having a storage branch and at least one element N, the received codewords being deinterleaved and buffered by the extended deinterleaver prior to being provided to the variable iteration decoder. Each appended storage branch further having a length that is extended by the length of N, N being at least one element, wherein as a codeword is provided to the variable iteration decoder, other codewords are provided to subsequent appended storage branches, and further wherein each appended storage branch, indexed by ‘b’, has a length of Lb+N, wherein Lb is the length of the storage branch prior to appending N.
摘要:
In one embodiment of the present invention, a dynamic multi-path detection device is disclosed to include at least one narrow-band signal metric estimator responsive to input signal. Each of the at least one estimators measures a particular characteristic of the input signal in a frequency band that is narrower than the overall signal bandwidth and is operative to generate a signal parameter estimate signal. The dynamic multi-path detection device is further disclosed to include a signal metric comparison device responsive to the signal parameter estimate signal(s) and operative to generate a dynamic multi-path indication signal for detecting dynamic multi-path.
摘要:
In one embodiment of the present invention, a dynamic multi-path detection device is disclosed to include at least one narrow-band signal metric estimator responsive to input signal. Each of the at least one estimators measures a particular characteristic of the input signal in a frequency band that is narrower than the overall signal bandwidth and is operative to generate a signal parameter estimate signal. The dynamic multi-path detection device is further disclosed to include a signal metric comparison device responsive to the signal parameter estimate signal(s) and operative to generate a dynamic multi-path indication signal for detecting dynamic multi-path.
摘要:
An adaptive known signal canceller comprising of a known signal canceller filter responsive to a known signal including a known portion of a transmitted signal, the known signal canceller filter operative to generate a filtered known signal, and a subtractor unit responsive to an input signal and operative to generate an output signal, the subtractor unit configured to subtract the filtered known signal from the input signal to generate an output signal, such that the known portion of the transmitted signal is substantially removed from the input signal. The adaptive known signal canceller further comprising of a known signal canceller update unit, responsive to a desired signal and an output signal and operative to continually adjust the coefficients of the known signal canceller filter based on the difference between the output signal and the desired signal, so that the filter coefficients substantially reflect the impulse response of a channel.
摘要:
An iterative decoder circuit includes an N number of sub-decoders, N−1 of the sub-decoders each being responsive to a baseband signal from one of M number of signal processing circuits. Each of the N−1 number of sub-decoders includes, an inner delay responsive to a baseband signal provided by a corresponding signal processing circuit for generating an inner delayed signal, a modified decoder that receives the inner delayed signal and generates a set partition signal, some of which have less errors than previous set partition signals. An Nth inner delay is responsive to the baseband signal and provides an Nth inner delayed signal. An Nth modified decoder is responsive to the Nth inner delayed signal and to the set partition signal and provides an output signal, wherein the probability of error of the output signal is reduced by correcting errors in some of the set partition signals.