Bit allocation and power control method for two-way relay system based on OFDM
A two-way relay, system bit technology, used in power management, transmission systems, payload distribution, etc.
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[0067] Such as figure 1 As shown, the source node N A And N B To complete an information exchange, two consecutive time slots of equal length are required. At the beginning of the first time slot, N A And N B Set array Let L=K, where K is the total number of sub-carriers, and then according to your target rate, allocate θ bits to K sub-carriers according to the above three-step algorithm, and then calculate each according to equations (12) and (13) The transmit power. Next, the source node N A And N B Then send their respective information to the relay node N at the same time R .
[0068] In the second time slot, the relay node N R The received signal needs to be scaled (the inherent operation flow of the AF protocol), and then its own transmission power is calculated according to formula (14), and then broadcast to the source node N A And N B . In order to complete the above operations, the relay node N R Need to know the number of bits allocated for each subcarrier. For thi...
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