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학술지
Pre-Rake TDD-CDMA System with Modified ZCD Codes
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- 저자
- 정인철, 차재상, 경문건
- 발행일
- 201209
- 출처
- 통신위성우주산업연구회논문지, v.7 no.2, pp.59-66
- ISSN
- 2384-3853
- 출판사
- 통신위성,우주산업연구회
- 초록
- In a frequency selective fading channel, Pre-Rake diversity technique provides simple receiver structure and sufficient diversity effect for mobile terminals. However, conventional Pre-Rake systems are more severely affected than Rake systems with regard to multiple access interference since the number of multipaths received at the mobile unit is nearly twice that of the Rake systems. In order to overcome the problem, a Pre-Rake TDD-CDMA system using zero correlation duration (ZCD) spreading code is proposed. Modified ZCD codes including guard interval (GI) is also proposed and the performance is evaluated by computer simulation under the condition of various channel environment.
- KSP 제안 키워드
- CDMA systems, Computer simulation(MC and MD), Diversity technique, Frequency Selective Fading Channels, Mobile unit, Multiple access interference(MAI), Receiver Structure, guard interval, mobile terminal, spreading code