This paper proposed four types of differential modulation to map the unitary code into the orthogonal frequency division multiplexing(OFDM) signal. The time-var
The analysis of the "tree-like network" construct method has been repeated.The high effective conduction channel distribution has been optimized again, without
Two variable channel-coding schemes with unequal error protection (UEP) are proposed in terms of speech transmission over VHF-mobile radio system. These channel