Adaptive modulation coding method based on double block error rates and signal to noise ratio difference value
A technology of adaptive modulation and modulation coding, which is applied in the field of communication, can solve problems such as the difficulty in setting the SNR threshold, and achieve the effects of strong channel adaptability, simple implementation, and good system transmission performance
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[0044] Below in conjunction with accompanying drawing and embodiment, describe technical solution of the present invention in detail:
[0045] The transmission method (flow process) and reception method (flow process) of this embodiment are the same as the background technology. The OFDM system is adopted, the channel coding adopts the Turbo coding method, and the modulation methods are BPSK, QPSK, 16QAM, and 64QAM. 15 times spread spectrum, the modulation and coding method adopts adaptive modulation and coding based on double block error rate and SNR difference, the MCS index table is shown in the following table, where the channel information rate is the transmission rate of modulation bits, and the source information rate is considered The transmission rate of source information bits after spreading, pilot frequency and synchronization overhead.
[0046] Table 2MCS index
[0047]
[0048] The technical solution of the present invention will be described in detail below ...
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