基于FPGA的FH/TH混合扩频系统设计资源-CSDN文库

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Design of FH/TH hybrid spread spectrum system

based on FPGA

Longjun Liu

School of Information, yunnan University

Kunming, China

893817028@qq.com

Qianlin Liu

School of Information, yunnan University

Kunming, China

liuqianlin@sina.com

Hongwei Ding

School of Information, yunnan University

Kunming, China

dhw1964@163.com

Weifeng Zhang

School of Information, yunnan University

Kunming, China

767950080@qq.com

Abstract—

According to the present situation of the

application of frequency hopping system, the existence question

and the characteristic of the frequency hopping,time hopping

system, based on the thought of complementary advantages and

disadvantages, this paper puts forward a hybrid spread

spectrum. It is to combine two kinds of spread spectrum with

frequency hopping and time hopping to constitute a FH/TH

hybrid spread spectrum system. We have conducted simulation

and FPGA implementation for the FH/TH hybrid spread

spectrum system and verify the validity of the design system.

Keywords—FH/TH; hybrid spread spectrum; simulation;

FPGA

1. INTRODUCTION

As two aspects of the jumping expansion system,

frequency hopping and time hopping have their own

National Natural Science Foundation (61461053, 61461054, 61072079),

Yunnan Province Natural Science Fund (2010CD023), Yunnan University

Fund (NO. XT412004).

advantages and disadvantages. This makes the two jump way

on the development and application is not the same. The

principle of frequency hopping is to make the carrier that is

used to send the modulation jump on the different frequency,

which makes the frequency of the emission signal jump

continuously in a wide frequency range [1]. As a result, it is

difficult to conduct frequency interference and intercept

decoding for the frequency hopping signal in the case without

knowing the frequency-hopping pattern. Frequency hopping

system has many fine properties, such as strong

anti-interference ability, high confidentiality, strong resistance

to multipath fading and multiple access capability, etc. These

properties make it rapid development and wide application in

the field of military and mobile communication. However, due

to the extremely wide range of applications of frequency

hopping technology, it has formed equipment in different

frequencies. According to relevant information, foreign armies

has formed a valid tracking ability to low and medium speed

(500/second) frequency hopping communications with

frequencies under 500~1000MHz [3]. This will make the

advantage of using frequency hopping system not be able to

play. With the development of ultra wideband UWB

International Conference on Computer Science and Electronic Technology (CSET 2016)

112

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