介绍一种基于FPGA的移动通信系统中可变速率的调制解调器的实现和设计,目前大多数的移动通信系统采用的都是速率对等的信道链路,即在调制解调过程中信道的数据速率是对等的,而讨论的是非对等的能够适合多种速率传输的,收发独立的调制解调器,这种可变速率的调制解调器可以很好的节省带宽,重点介绍该调制解调器的原理和实现流程。 This paper introduces the implementation and design of a variable rate modem in a mobile communication system based on FPGA. At present, most mobile communication systems use channel links with equal rate, that is, the data rate of the channel in the modem process Are peer-to-peer, and discuss non-equivalent transceivers capable of transmitting and receiving at multiple rates. This variable-rate modem saves bandwidth and focuses on the modem’s principles and implementation flow.