| 摘要 |
PROBLEM TO BE SOLVED: To provide MD coding which can be suitably embodied in such a wireless communication system application as the frequency hopping wireless system. SOLUTION: A multiple-description coder generates many different descriptions in a prescribed portion of signals in a wireless communication system by using multiple description scalar quantization(MDSQ) or another type of multiple description coding. The different descriptions in the prescribed portion of the signals are arranged in a plurality of packets, so that at least the first description in the prescribed portion may be arranged in the first packet and the second description may be arranged in the second packet. Each packet is transmitted by using a frequency hopping modulator and the hopping rate of the modulator is selected or constituted based, at least partially, on the number of descriptions generated with respect to the different portions of the signals.
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