Patent ID: 7933340
Filing Date: 2011-04-26
Classification: H04B,H04L,H04W

Abstract:
1. A communications system having a transmission apparatus for transmitting a signal and a reception apparatus for receiving said signal, said reception apparatus comprising: a transmission mode table for holding, as transmission modes, a plurality of combinations of a modulating scheme and a coding ratio to be applied to said signal transmitted from said transmission apparatus; propagation path condition detecting means for detecting a condition of propagation path with said transmission apparatus; transmission mode extraction means for extracting a transmission mode transmitted from said transmission apparatus; threshold adjustment means for adjusting a threshold value of said propagation path condition at the time of selecting a transmission mode to be proposed next in accordance with a difference between said extracted transmission mode and a transmission mode proposed last; and transmission mode proposal means for selecting a proper transmission mode from among transmission modes held in said transmission mode table on the basis of a relation between said propagation path condition and said threshold value and proposing said selected transmission mode to said transmission apparatus.