多载波CDMA系统中关键技术的研究
摘要
扩频码分多址已成功地应用于第二代移动通信中，如IS-95，而且第三代移动通信的主要方案也都是基于码分多址CDMA，因此CDMA技术具有无可争辩的竞争力。但是CDMA的容量却受限于多址干扰与多径干扰，而多载波技术具有很强的抗多径干扰的能力。因此人们开始寻找将多载波应用于CDMA的技术途径(OFDM)，而多载波CDMA系统(MC-CDMA，有时也可称作OFDM-CDMA)也便应运而生。本文以目前通信领域的热点：OFDM(正交频分复用)为研究方向，对于多载波CDMA系统中的若干关键技术，即多载波CDMA系统中的调制技术、峰平比性能、接收端检测技术以及整个系统同步问题进行了研究，并给出相应的计算机仿真结果。然后，利用Monte-Carlo算法对多载波CDMA系统在多径衰落信道下的性能进行了仿真分析。本文在深入研究多载波CDMA系统的一些传统通信技术基础之上，有所改进，从而使多载波CDMA系统性能得到了进一步改善。
Spread spectrum code division multiple access technique (SS-CDMA) has successfully been applied in the second generation mobile communication system, such as IS-95. Moreover, the main technique of the third generation mobile communication system is also based on CDMA. So CDMA is irrefutablely competitive. However, the capacity of conventional CDMA communication system is confined by multi-access interference (MAI) and multi-path interference (MPI). At the same time, Multi-Carrier technique has the good ability of anti-multi-path interference. Therefore, people start to find the way to apply Multi-Carrier to CDMA (OFDM), and MC-CDMA system (also called OFDM-CDMA) emerged in time.
In this dissertation, OFDM which has been the hottest spot in communication field recently will be considered as my direction. The dissertation will study some key techniques in MC-CDMA system, such as modulation technique, Peak-Average Power Ratio, detection technique and synchronization problem of the whole system. What's more, the results of calculation and simulation will be given. Then, the performance of MC-CDMA system in multi-path fading channels will be simulated and analysed by means of Monte-Carlo method.
On the basis of conventional communication techniques in MC-CDMA system, some improved techniques will be employed , and then the performance of the MC-CDMA system can be enhanced further.
Spread spectrum code division multiple access technique (SS-CDMA) has successfully been applied in the second generation mobile communication system, such as IS-95. Moreover, the main technique of the third generation mobile communication system is also based on CDMA. So CDMA is irrefutablely competitive. However, the capacity of conventional CDMA communication system is confined by multi-access interference (MAI) and multi-path interference (MPI). At the same time, Multi-Carrier technique has the good ability of anti-multi-path interference. Therefore, people start to find the way to apply Multi-Carrier to CDMA (OFDM), and MC-CDMA system (also called OFDM-CDMA) emerged in time.
In this dissertation, OFDM which has been the hottest spot in communication field recently will be considered as my direction. The dissertation will study some key techniques in MC-CDMA system, such as modulation technique, Peak-Average Power Ratio, detection technique and synchronization problem of the whole system. What's more, the results of calculation and simulation will be given. Then, the performance of MC-CDMA system in multi-path fading channels will be simulated and analysed by means of Monte-Carlo method.
On the basis of conventional communication techniques in MC-CDMA system, some improved techniques will be employed , and then the performance of the MC-CDMA system can be enhanced further.
引文
[1] 沈允春．扩谱技术．北京：国防工业出版社，1995：17-18页
[2] 祁玉生，邵世祥．现代移动通信系统．人民邮电出版社，1999：24-31页，254-258页
[3] 竺南直，肖辉，刘景波编著．码分多址(CDMA)移动通信系统．电子工业出版社，1999：6-23页，156-168页
[4] 李振玉，卢玉民编著．扩频选址通信．北京：国防工业出版社，1988：86-109页，146-215页
[5] 朱近康．扩展频谱通信及应用．中国科技大学出版社，1995：69-83页，105-136页
[6] 钟义信编著．伪噪声编码通信．人民邮电出版社，1979：123-223页，263-271页
[7] 林可祥，汪一飞编著．伪随机码的原理与应用．人民邮电出版社，1978：127-162页，247-258页
[8] A.J.维特比．CDMA扩频通信原理．李世鹤，鲍刚，彭容译．人民邮电出版社，1997：10-24页
[9] Theodore S.Rappaport．无线通信原理与应用．蔡涛，李旭，杜振民译．电子工业出版社，1999：203-210页，298-300页
[10] John G.Proakis．数字通信(第三版)．电子工业出版社，1998：680-689页，758-830页
[11] 吴俊，王艺，吴伟陵．一种降低MC-CDMA信号峰值平均功率比的方法．电子学报．1999，27(11)：50-51页
[12] 唐友喜．CDMA通信系统抗多址干扰问题的研究．电子科技大学博士学位论文．1996：1-9页
[13] 杨万全，朱立东，汤黎．基于m序列的周期任意长伪随机序列产生方法．现代通信技术．1999，(1)：21-24页
[14] 阮永红，祁玉生．DS-CDMA系统正交码调制的抗多址干扰性能及其改进．通信学报．1999，20(8)：86-90页
[15]封翔，毕光国．一种用于CDMA系统的正交序列调制方法．通信学报．1998，19(8)：32-38页
[16]凌聪，孙松庚．用于CDMA的四相混沌扩频序列．通信学报．1998，19(3)：40-44页
[17]姬翔，钟义信．CDMA多用户检测技术．现代通信技术．1999，(1)：28-32页
[18]王焱，程时昕．多用户检测CDMA系统中的功率控制性能及其在系统设计中的应用．通信学报．1998，19(8)：7-12页
[19]王学勤．准同步(QS-CDMA)多址系统扩频序列(PN)设计．西安邮电学院学报．1998，3(2)：11-17页
[20]曾召华，李白萍，刘少亭．码分多址数字移动通信的抗多径衰落技术．通信技术与发展．1998，(1)：24-27页
[21]刘晓荣，朱世华，任品毅．直接序列扩频码分多址系统多址干扰的最大似然联合估计．西安交通大学学报．1999，33(9)：35-38页
[22]胡捍英，邬江兴，樊昌信．高斯信道和多径衰落信道中码分多址系统的性能．西安电子科技大学学报．1998，25(1)：51-56页
[23]Nati Dinur, Dov Wulich. Peak-to-Average Power Ratio in High-Order OFDM. IEEE Trans. Commun. 2001,49(6): 11063-1072P
[24]Richard D.J. van Nee. OFDM Codes for Peak-to-Average Power Reduction and Error Correction. Lucent Technologies Bell Labs Zadelstede 1-10: 740-744P
[25]Stefan Kaiser. On the Performance of Different Detection Techniques for OFDM-CDMA in Fading Channels. IEEE Trans. Commun.1995,5(95): 2059-2063P
[26]Shinsuke Hara, Ramjee Prasad. Design and Performance of Multicarrier CDMA System in Frequency-Selective Rayleigh Fading Channels. IEEE Trans. Commun. 1999,48(5):1584-2388P
[27]Nathan Yee, Jean-Paul Linnartz. BER OF Multi-Carrier CDMA in an Indoor Rician Fading Channel. IEEE Trans. Commun. 1993, 93 (6):426-430P
[28]Wuyang Zhou, Xiaowen lu, Jinkang Zhu. M-ary MC-CDMA System for 4G.IEEE Trans. Commun. 2001,8(1): 2234-2238P
[29]Shinya Matsufuji and Naoki Suehiro. On Functions for Quadri-Phase Complimentary Sequences of Length 2n. Technical Report of IEICE.1998, (3): 93-97P
[30]Y. Taki, H. Miyakawa, M. Hatori and S. Namba. Even-Shift Orthogonal Sequences. IEEE Trans. Inf. Theory. 1969, IT-15: 295-300P
[31]Sakda Unawong, Shinichi Miyamoto, Norihiko Morinaga. A Novel Receiver Design for DS-CDMA Systems under Impulsive Radio Noise Environments. IEICE Trans. Commun. 1999, E82-B (6): 936-943P
[32]Xiao Hua Chen, Hak Keong Sim and Pang Shyan Kooi. An Effective CDMA Multi-User Detection Scheme-Orthogonal Decision-Feedback Detection and Its Performance Analysis. IEICE Trans. Commun. 1997,E80-B (1):145-155P
[33]Masao Shibatani, Noriyoshi Kuroyanagi, Naoki Suehiro and Satoru Ozawa. A CDMA Receiver with Analyzing Function of Matched Filter Output Noise Components. Technical Report of IEICE. 1998, (6):33-38P
[2] 祁玉生，邵世祥．现代移动通信系统．人民邮电出版社，1999：24-31页，254-258页
[3] 竺南直，肖辉，刘景波编著．码分多址(CDMA)移动通信系统．电子工业出版社，1999：6-23页，156-168页
[4] 李振玉，卢玉民编著．扩频选址通信．北京：国防工业出版社，1988：86-109页，146-215页
[5] 朱近康．扩展频谱通信及应用．中国科技大学出版社，1995：69-83页，105-136页
[6] 钟义信编著．伪噪声编码通信．人民邮电出版社，1979：123-223页，263-271页
[7] 林可祥，汪一飞编著．伪随机码的原理与应用．人民邮电出版社，1978：127-162页，247-258页
[8] A.J.维特比．CDMA扩频通信原理．李世鹤，鲍刚，彭容译．人民邮电出版社，1997：10-24页
[9] Theodore S.Rappaport．无线通信原理与应用．蔡涛，李旭，杜振民译．电子工业出版社，1999：203-210页，298-300页
[10] John G.Proakis．数字通信(第三版)．电子工业出版社，1998：680-689页，758-830页
[11] 吴俊，王艺，吴伟陵．一种降低MC-CDMA信号峰值平均功率比的方法．电子学报．1999，27(11)：50-51页
[12] 唐友喜．CDMA通信系统抗多址干扰问题的研究．电子科技大学博士学位论文．1996：1-9页
[13] 杨万全，朱立东，汤黎．基于m序列的周期任意长伪随机序列产生方法．现代通信技术．1999，(1)：21-24页
[14] 阮永红，祁玉生．DS-CDMA系统正交码调制的抗多址干扰性能及其改进．通信学报．1999，20(8)：86-90页
[15]封翔，毕光国．一种用于CDMA系统的正交序列调制方法．通信学报．1998，19(8)：32-38页
[16]凌聪，孙松庚．用于CDMA的四相混沌扩频序列．通信学报．1998，19(3)：40-44页
[17]姬翔，钟义信．CDMA多用户检测技术．现代通信技术．1999，(1)：28-32页
[18]王焱，程时昕．多用户检测CDMA系统中的功率控制性能及其在系统设计中的应用．通信学报．1998，19(8)：7-12页
[19]王学勤．准同步(QS-CDMA)多址系统扩频序列(PN)设计．西安邮电学院学报．1998，3(2)：11-17页
[20]曾召华，李白萍，刘少亭．码分多址数字移动通信的抗多径衰落技术．通信技术与发展．1998，(1)：24-27页
[21]刘晓荣，朱世华，任品毅．直接序列扩频码分多址系统多址干扰的最大似然联合估计．西安交通大学学报．1999，33(9)：35-38页
[22]胡捍英，邬江兴，樊昌信．高斯信道和多径衰落信道中码分多址系统的性能．西安电子科技大学学报．1998，25(1)：51-56页
[23]Nati Dinur, Dov Wulich. Peak-to-Average Power Ratio in High-Order OFDM. IEEE Trans. Commun. 2001,49(6): 11063-1072P
[24]Richard D.J. van Nee. OFDM Codes for Peak-to-Average Power Reduction and Error Correction. Lucent Technologies Bell Labs Zadelstede 1-10: 740-744P
[25]Stefan Kaiser. On the Performance of Different Detection Techniques for OFDM-CDMA in Fading Channels. IEEE Trans. Commun.1995,5(95): 2059-2063P
[26]Shinsuke Hara, Ramjee Prasad. Design and Performance of Multicarrier CDMA System in Frequency-Selective Rayleigh Fading Channels. IEEE Trans. Commun. 1999,48(5):1584-2388P
[27]Nathan Yee, Jean-Paul Linnartz. BER OF Multi-Carrier CDMA in an Indoor Rician Fading Channel. IEEE Trans. Commun. 1993, 93 (6):426-430P
[28]Wuyang Zhou, Xiaowen lu, Jinkang Zhu. M-ary MC-CDMA System for 4G.IEEE Trans. Commun. 2001,8(1): 2234-2238P
[29]Shinya Matsufuji and Naoki Suehiro. On Functions for Quadri-Phase Complimentary Sequences of Length 2n. Technical Report of IEICE.1998, (3): 93-97P
[30]Y. Taki, H. Miyakawa, M. Hatori and S. Namba. Even-Shift Orthogonal Sequences. IEEE Trans. Inf. Theory. 1969, IT-15: 295-300P
[31]Sakda Unawong, Shinichi Miyamoto, Norihiko Morinaga. A Novel Receiver Design for DS-CDMA Systems under Impulsive Radio Noise Environments. IEICE Trans. Commun. 1999, E82-B (6): 936-943P
[32]Xiao Hua Chen, Hak Keong Sim and Pang Shyan Kooi. An Effective CDMA Multi-User Detection Scheme-Orthogonal Decision-Feedback Detection and Its Performance Analysis. IEICE Trans. Commun. 1997,E80-B (1):145-155P
[33]Masao Shibatani, Noriyoshi Kuroyanagi, Naoki Suehiro and Satoru Ozawa. A CDMA Receiver with Analyzing Function of Matched Filter Output Noise Components. Technical Report of IEICE. 1998, (6):33-38P