Abstract: The present invention provides a method of processing radio frequency (RF) bursts dependent on a speech mode associated with data contained within the RF burst. Different voice modes, full rate, half rate, and adaptive multi-channel rates each may require different signal to noise ratio (SNR) conditions in order to be successfully processed. To improve the equalization of the received RF burst(s), the SNR associated with the burst is estimated. Then based on the SNR or other related conditions (i.e. the presence or absence of colored noise, and the estimated channel profile) a decision can be made as to whether or not an interference cancellation burst process should be implemented.

Abstract: A method for successive interference cancellation in code division multiple access (CDMA) systems is provided that uses variable interferer weights. This method allows interfering signals to be cancelled in order to recover a transmitted data signal. This method involves receiving the data signal subject to interference from at least one interfering signal. A first interfering signal is identified. Then an interferer weight coefficient associated with the first interfering signal is generated. This allows the first interfering signal to be cancelled from the received data signal using the interferer weight coefficient. These processes may then be reiterated for other interfering signals. It is then possible to recover the transmitted data signal from the received data signal.

Abstract: A method for successive interference cancellation in code division multiple access (CDMA) systems is provided that uses variable interferer weights. This method allows interfering signals to be cancelled in order to recover a transmitted data signal. This method involves receiving the data signal subject to interference from at least one interfering signal. A first interfering signal is identified. Then an interferer weight coefficient associated with the first interfering signal is generated based on its signal strength and SF upon acquisition of the SF. This SF may be monitored such that the Interferer weight may be adjusted when the SF changes based on the detected changes. This allows the first interfering signal to be cancelled from the received data signal using the interferer weight coefficient. These processes may then be reiterated for other interfering signals. It is then possible to recover the transmitted data signal from the received data signal.

Abstract: The feedback of reinterleaved correctly decoded data blocks to a decoder is provided for use in channel decoding operations of channel coded word containing data block. Once a properly decoded data block has been determined, feedback of constraints on the estimated bit sequences decoded data characteristics to a turbo decoder assist in additional decoding operations. Estimated bit sequences may be selected from those trellises that pass through the constraint imposed by knowledge of re-interleaving properly decoded data blocks. This allows the decoder to generate solutions having a minimum probability of error that are also confined by the re-interleaved properly decoded data blocks.

Abstract: A method and system for decoding video, voice, and/or speech data using redundancy and physical constraints are presented. Video, voice, and/or speech bit sequences may be decoded in a multilayer process based on a decoding algorithm and at least one physical constraint. For voice applications, the decoding algorithm may be based on the Viterbi algorithm. At least one estimated bit sequence may be selected by performing searches that start from trellis junctions determined during by the decoding algorithm. The estimated bit sequences may be selected based on corresponding redundancy verification parameters. At least one physical constraint test may be performed on the selected estimated bit sequences to select a decoded output bit sequence.

Abstract: A method and system for improving reception in wired and wireless systems through redundancy and iterative processing are provided. A multilayer decoding process may comprise a burst process and a frame process. Results from a first burst process may be utilized to generate a decoded bit sequence in the frame process. The frame process may utilize redundancy information and physical constraints to improve the performance of a decoding algorithm. Results from the frame process may be fed back for a second iteration of the burst process and of the frame process, to further improve the decoding operation. In some instances, the second iteration of the burst process may be based on a gradient search approach.

Abstract: A method and system for decoding video, voice, and/or speech data using redundancy and physical constraints are presented. Video, voice, and/or speech bit sequences may be decoded in a multilayer process based on a decoding algorithm and at least one physical constraint. For voice applications, the decoding algorithm may be based on the Viterbi algorithm. At least one estimated bit sequence may be selected by performing searches that start from trellis junctions determined during by the decoding algorithm. The estimated bit sequences may be selected based on corresponding redundancy verification parameters. At least one physical constraint test may be performed on the selected estimated bit sequences to select a decoded output bit sequence.

Abstract: A method and system for improving reception in wired and wireless systems through redundancy and iterative processing are provided. A multilayer decoding process may comprise a burst process and a frame process. Results from a first burst process may be utilized to generate a decoded bit sequence in the frame process. The frame process may utilize redundancy information and physical constraints to improve the performance of a decoding algorithm. Results from the frame process may be fed back for a second iteration of the burst process and of the frame process, to further improve the decoding operation. In some instances, the second iteration of the burst process may be based on a gradient search approach.

Abstract: Aspects of a method and system for a variable spreading factor Walsh Hadamard Transform engine are presented. Aspects of the system may include a variable spreading factor Fast Walsh Hadamard Transform engine that enables spread spectrum encoding of data from each of a plurality of data sources. A plurality of spreading factors may be utilized wherein at least 2 of the plurality of spreading factors differ. The variable spreading factor Fast Walsh Hadamard Transform engine may enable combination of a plurality of spread spectrum encoded data to form a data vector.

Abstract: The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon known training sequences and equalize the received RF burst. This results in soft samples or decisions which in turn may be converted to data bits. The soft samples are processed with a de-interleaver and channel decoder, where the combination is operable to produce a decoded frame of data bits from the soft samples. A re-encoder may re-encode the decoded frame to produce re-encoded or at least partially re-encoded data bits. An interleaver then processes the at least partially re-encoded data bits to produce and at least partially re-encoded burst.

Abstract: A processing module produces improved main channel estimate. This process involves initially estimating the channel impulse response. This result is based on and combined with a known sequences such as that provided by training sequences of the midamble within RF bursts. From this combination, it is possible to produce an estimated signal from a convolution of the channel impulse response and midamble. The estimated signal may be cancelled or subtracted from the received signal to produce a clearer image of the disturber signal. A blind data recovery performed upon the disturber signal. The recovered disturber data may be used as a reference for disturber channel estimation in order to produce a disturber channel impulse response. With the estimated disturber channel impulse response and the recovered disturber data, an estimated disturber signal may be reconstructed and subtracted from the received signal. This allows the cancellation of the estimated disturber signal.

Abstract: A system and method for Bluetooth® decoding is disclosed and may include calculating a remainder value based on a received bit sequence and a generator polynomial for a corresponding transmitted Bluetooth bit sequence. Remainders may be generated from known error vectors and the generator polynomial. The generated remainders may result in at least a portion of the known error vectors corresponding to the generator polynomial. A codeword may be selected that may correspond to the calculated reminder value that matches one of the generated remainders. The generated remainders may be stored in a look-up table. An initial metric value may be calculated utilizing the following equation: M 0 = ? n = 0 14 ? ? abs ? ( RX ? ( n ) ) , where RX(n) may include the received bit sequence. The codeword with a metric value equal to M0 may be selected, if the calculated remainder value is equal to 0.

Abstract: The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon known training sequences and equalize the received RF burst. This results in soft samples or decisions which in turn may be converted to data bits. The soft samples are processed with a de-interleaver and channel decoder, where the combination is operable to produce a decoded frame of data bits from the soft samples. A re-encoder may re-encode the decoded frame to produce re-encoded or at least partially re-encoded data bits. An interleaver then processes the at least partially re-encoded data bits to produce and at least partially re-encoded burst.

Abstract: A method for successive interference cancellation in code division multiple access (CDMA) systems is provided that uses variable interferer weights. This method allows interfering signals to be cancelled in order to recover a transmitted data signal. This method involves receiving the data signal subject to interference from at least one interfering signal. A first interfering signal is identified. Then an interferer weight coefficient associated with the first interfering signal is generated. This allows the first interfering signal to be cancelled from the received data signal using the interferer weight coefficient. These processes may then be reiterated for other interfering signals. It is then possible to recover the transmitted data signal from the received data signal.

Abstract: The present invention provides a processing module operable to produce an improved channel impulse response. This process involves initially estimating the channel impulse response. This result is based on and combined with a known sequences such as that provided by training sequences of the midamble within RF bursts. From this combination, it is possible to produce an estimated signal from a convolution of the channel impulse response and midamble. The estimated signal may be cancelled or subtracted from the received signal to produce a clearer image of the disturber signal. A blind data recovery performed upon the disturber signal. The recovered disturber data may be used as a reference for disturber channel estimation in order to produce a disturber channel impulse response. With the estimated disturber channel impulse response and the recovered disturber data, an estimated disturber signal may be reconstructed and subtracted from the received signal.

Abstract: This invention provides colored noise detection algorithm(s). This colored noise detection algorithm(s) may be implemented with a multi-branch equalizer processing module that enables interference cancellation when colored noise is associated with received radio frequency (RF) bursts. The noise discriminator identifies when the radio frequency (RF) bursts have white noise or colored noise associated with them. Alternatively the noise discriminator may be able to determine and enable interference cancellation in response to an interference-limited received RF burst as opposed to a noise-limited received RF burst. The multi-branch equalizer improves the signal-to-noise ratio by improving the equalization with a second branch operable to be trained based upon known training sequences and at least partially re-encoded data bits.

Abstract: Aspects of a method and system for redundancy-based decoding of audio content are provided. A redundancy parameter may be generated for verifying a decoded bit sequence that comprises audio content, such as a decoded audio frame. The redundancy parameter may be a cyclic redundancy check (CRC) value and/or a length of frame value associated with the decoded audio frame. Information associated with the redundancy parameter may be comprised within a header of the audio frame. For example, a length of frame value, a bitrate value, a sampling rate frequency value, and/or a frame padding value may be comprised within the header of the audio frame. If the verification of the decoded audio frame fails, subsequent decoding of the previously decoded audio frame may be performed by imposing at least one physical constraint that results from the encoding of the audio frame.

Abstract: A method for successive interference cancellation in code division multiple access (CDMA) systems is provided that uses variable interferer weights. This method allows interfering signals to be cancelled in order to recover a transmitted data signal. This method involves receiving the data signal subject to interference from at least one interfering signal. A first interfering signal is identified. Then an interferer weight coefficient associated with the first interfering signal is generated based on its signal strength and SF upon acquisition of the SF. This SF may be monitored such that the Interferer weight may be adjusted when the SF changes based on the detected changes. This allows the first interfering signal to be cancelled from the received data signal using the interferer weight coefficient. These processes may then be reiterated for other interfering signals. It is then possible to recover the transmitted data signal from the received data signal.

Abstract: Aspects of a method and system for feedback of decoded data characteristics to decoder in stored data access and decoding operations to assist in additional decoding operations are presented. Aspects of the system may include a decoder that enables decoding of a portion of encoded data. A processor may enable generation of at least one hypothesis based on the decoded portion of encoded data and/or redundancy information associated with at least the decoded portion of the encoded data. The decoder may enable generation of one or more subsequent portions of decoded data based on the generated at least one hypothesis.

Abstract: A system for transporting a high speed data stream over a plurality of relatively low bandwidth unshielded twisted copper pairs within the local loop plant or in any environment having a plurality of copper lines. A transmit data processor may perform scrambling, FEC encoding, and interleaving on the data before it is divided and dispatched to the plurality of modem elements for transmission over the local loop plant, either bidirectionally or unidirectionally. On the receiving side, the individual data streams are collected, aggregated, and a receive data processor performs de-interleaving, FEC decoding and de-interleaving, resulting in the high speed data stream originally transmitted. The system also may include crosstalk cancellation, power and PSD control, data raze control and optimal routing of the transmitted signals within the twisted pair binders. The system may optionally multiplex a plurality of low bandwidth telephony services over the high speed link using either TDM or FDM techniques.