Method and system for redundancy-based decoding in 8-PSK GSM systems

A non-transitory computer readable medium having stored thereon, a computer program having at least one code section for signal processing, the at least one code section being executable by a computer for causing the computer to perform steps comprising:

• processing a received 8-PSK modulated symbol sequence in a burst process utilizing a gradient search equalization operation, said processing comprising:
• computing a distance metric value during said gradient search equalization operation wherein said distance metric value is based on at least a portion of said received 8-PSK modulated symbol sequence, a computed channel estimate matrix and a transmitted symbol estimation vector;
• computing a gradient distance value based on a change in said computed distance metric value in response to a change in said transmitted symbol estimation vector;
• computing an updated transmitted symbol estimation vector based on a current transmitted symbol estimation vector and said computed gradient distance value;
• generating a redundancy-based decoded output bit sequence by a frame process based on results from said burst process;
• feeding back said generated redundancy-based decoded output bit sequence for processing by a subsequent burst process utilizing said gradient search equalization operation;
• and
• generating a subsequent redundancy-based decoded output bit sequence by a subsequent frame process based on results from said subsequent burst process.

A system for signal processing, the system comprising:

• a burst processor and a frame processor;
• said burst processor is operable to process a received 8-PSK modulated symbol sequence by utilizing a gradient search equalization operation;
• said burst processor is operable to compute a distance metric value during said gradient search equalization operation wherein said distance metric value is based on at least a portion of said received 8-PSK modulated symbol sequence, a computed channel estimate matrix and a transmitted symbol estimation vector;
• said burst processor is operable to compute a gradient distance value based on a change in said computed distance metric value in response to a change in said transmitted symbol estimation vector;
• said burst processor is operable to compute an updated transmitted symbol estimation vector based on a current transmitted symbol estimation vector and said computed gradient distance value;
• said frame processor is operable to generate a redundancy-based decoded output bit sequence based on burst process results from said burst processor;
• said frame processor is operable to feed back said generated redundancy-based decoded output bit sequence for processing by said burst processor in a subsequent burst process utilizing said gradient search equalization operation;
• and
• said frame processor is operable to generate a subsequent redundancy-based decoded output bit sequence by a subsequent frame process based on results from said subsequent burst process by said burst processor.