초록 ▼

A method and apparatus for determining the rate of received data in a variable rate communication system. The receiving system decodes each frame of the received signal to produce a set of normalized correlation metrics, cyclic redundancy check (CRC) bits, and possibly Yamamoto quality metrics, one

A method and apparatus for determining the rate of received data in a variable rate communication system. The receiving system decodes each frame of the received signal to produce a set of normalized correlation metrics, cyclic redundancy check (CRC) bits, and possibly Yamamoto quality metrics, one for each possible data rate. The normalized correlation metric for each rate is calculated from a correlation value an a constant computed for that rate. The correlation value is determined from a correlation of the demodulated soft frame symbols and the re-encoded frame. The highest normalized correlation metric is selected and the CRC bit for this data rate is checked. If the CRC checks, this data rate is indicated as the received data rate. Otherwise, the next highest normalized correlation metric is selected and the process continues. If no CRC check, an erasure is indicated.

대표청구항 ▼

[ I claim:] [1.] A receiving system for determining a data rate of a received signal in a variable rate communication system comprising:a decoder for receiving demodulated soft frame symbols and providing decoded frames and a normalized correlation metric;a rate selector connected to said decoder fo

[ I claim:] [1.] A receiving system for determining a data rate of a received signal in a variable rate communication system comprising:a decoder for receiving demodulated soft frame symbols and providing decoded frames and a normalized correlation metric;a rate selector connected to said decoder for receiving said normalized correlation metric, said rate selector providing an indication of said data rate of said received signal in accordance with said normalized correlation metric.