| 摘要: |
| GPS高空气象探测技术比常规雷达探空技术性能更优。由于频段（国际电联规定的400
MHz气象频段）的限制，其信道重用、邻频干扰和其它干扰情况极为严重，令GPS探空系统
通信信道的质量极差。为此，采用RSCC级联编码方式进行信道编码。Matlab仿真结果表明，
在400 MHz载波频率、2 400 bit/s、5 dB信噪比的条件下，传输误码率降低到10
－3，数据接收率能够满足气象探空的要求。最后给出了采用TMS320VC5402的
通信模块硬件实现的编、译码核心部分。 |
| 关键词: GPS探空系统 无线通信 数据传输 信道编码 DSP设计 |
| DOI： |
|
| 基金项目: |
|
| Communication Module Design for GPS Radiosonde System Based on DSP |
| GAO Ling-na,YAO Zhen-dong |
| (Chengdu University of Information Technology, Chengdu 610225, China) |
| Abstract: |
| Meteorological sounding using GPS technology performs better than
conventional radar sounding. Channel reuse, adjacent channel interference and ot
her interference are very serious as the limits of band of 400 MHz regulate
d by ITU, which leads to the poor quality of communication channel. Therefore,
RSCC cascade code is used for channel coding.Matlab simulation results show
that, in the condition of 400 MHz carrier frequency，2400 baud rate,5dB SNR
, the BER reduces to 10－3,and the data receiving rate is able to
meet the requirements of meteorological sounding. Finally, DSP TMS320VC5402
is adopted in hardware to realize the core part of encoding and decoding of t
he communicating module. |
| Key words: GPS radiosonde dystem wireless communication data transmission channel coding DSP design |
