基于TDMA/CDMA的2/4路通信系统的改进研究

某单位正在使用的采用码分多址方案实现点对多点的2/4路通信系统,由于信道采用异步传输,存在强码间干扰,且未实现信道共享,极大地限制了其使用范围,需要对其进行改进以提高其抗干扰能力与对多种业务的适应性。由于TDMA/CDMA制式具有诸多优势,本文从硬件设备和通信协议两方面对2/4路通信系统进行了基于TDMA/CDMA的实现信道共享和信道容量可变的改进研究,并对改进后的系统传输能力及抗干扰能力进行了评估。该项改进在尽可能少地改动硬件设备的前提下,利用信道资源管理、流量控制、预留及分配、冲突分解等一系列系统通信协议,大大增强了系统的抗干扰能力,实现了信道共享,并使系统能够满足多种业务的需求。

Improvement on the 2/4 communication system based on the TDMA/CDMA

There is a 2/4 communication system using CDMA to implement point-to-points communication.Because the channel of the system uses asynchronism transmission,the channel has serious disturb between the codes.And the channels aren't shared with each other,so the using spectrum of the system is restricted.To improve the anti-disturb ability and the adaptability to multi-operations of the system,it needs to be improved.Because the TDMA/CDMA has many advantages,based on the TDMA/CDMA,this paper improves the 2/4 communication system in hardware and communication protocol to implement the share and the capacity alterability of the channels.This paper also evaluates the transmission ability and the anti-disturb ability of the improved system.Changing the hardware as less as impossible,the research greatly improves the anti-disturb ability of the system,implements the share of the channels and makes the system to meet the requirement of multi-operations with the protocols of resource management,flux control,reservation and distribution,conflict disintegrate.