Abstract: Embodiments of a space-time decoder and methods for decoding Alamouti-encoded signals in high-Doppler environments are generally described herein. Other embodiments may be described and claimed. In some embodiments, soft-symbol outputs are generated from received symbols, a channel rate-of-change, and channel coefficients. Maximum-likelihood decoding may be performed to generate hard-symbol outputs from the soft-symbol outputs.

Abstract: Apparatus and methods are provided to decode signals from a communication channel to reconstruct transmitted information. Embodiments may include applying a plurality of decoders to a code, in which reliability values are provided to a decoder such that the decoder receives the reliability values determined by and provided from only one other decoder of the plurality of decoders. A valid codeword may be output from application of the plurality of decoders to the code.

Abstract: Methods, apparatus, and systems are provided to encode a low-density parity-check codeword for transmission in a communications channel. In an embodiment, the encoding may include partially computing parity-check bits in response to receiving a block of message bits before obtaining all the message bits for the low-density parity-check codeword, including updating previously partially computed parity-check bits that depend on the received block.

Abstract: Embodiments of a space-time decoder and methods for decoding Alamouti-encoded signals in high-Doppler environments are generally described herein. Other embodiments may be described and claimed. In some embodiments, soft-symbol outputs are generated from received symbols, a channel rate-of-change, and channel coefficients. Maximum-likelihood decoding may be performed to generate hard-symbol outputs from the soft-symbol outputs.

Abstract: Apparatus and methods are provided to correct burst errors from a communication channel. Embodiments may include correcting burst errors in received data using a decoder configured as a Meggitt decoder with an additional selection criterion to correct a burst error having a length larger than the code error correction capability.

Abstract: A method and apparatus are provided for error correction of a communication signal. A multiple fixed threshold scheme for iteratively decoding a received codeword includes making a comparison with a threshold to generate a reconstructed version of the received codeword. The threshold has at least two different values that at used during different iterations. The values of the threshold are fixed having been determined prior to decoding. In an embodiment, the fixed thresholds may be based on values for channel parameters and may be selected by a decoder that receives information regarding the channel parameter from a channel estimation unit monitoring the communication channel. Embodiments include decoding methods and apparatus using a threshold having two of more fixed values during the iterative decoding.

Abstract: Apparatus and methods arc provided to decode signals from a communication channel to reconstruct transmitted information. Embodiments may include applying a plurality of decoders to a code, in which reliability values are provided to a decoder such that the decoder receives the reliability values determined by and provided from only one other decoder of the plurality of decoders. A valid codeword may be output from application of the plurality of decoders to the code.

Abstract: Methods, apparatus, and systems are provided to encode a low-density parity-check codeword for transmission in a communications channel. In an embodiment, the encoding may include partially computing parity-check bits in response to receiving a block of message bits before obtaining all the message bits for the low-density parity-check codeword, including updating previously partially computed parity-check bits that depend on the received block.

Abstract: Apparatus and methods are provided to correct burst errors from a communication channel. Embodiments may include correcting burst errors in received data using a decoder configured as a Meggitt decoder with an additional selection criterion to correct a burst error having a length larger than the code error correction capability.