Frequency Offset Compensation Scheme Using Interference Cancellation in Reverse Link of OFDM/SDMA Systems(Coding Theory,<Special Section>Information Theory and Its Applications)

スポンサーリンク

概要

• 論文の詳細を見る

• In the reverse link of orthogonal frequency division multiplexing (OFDM)/space division multiple access (SDMA) systems, each receive antenna of a base station receives a multiplexed version of signals transmitted from users, where the transmitted signals have individual amounts of frequency offset. Therefore, a frequency offset compensation scheme which is different from those used in general OFDM systems is required. For this requirement, frequency offset compensation schemes using the feedback transmission from the base station to user terminals have been proposed for multiuser OFDM systems. These schemes work with good precision when the feedback information is correct and is transmitted without errors. However, when the offset information is incorrectly received at user terminals, the frequency offset is not accurately compensated for. In OFDM/SDMA systems, one user is enough for causing inter-carrier interference to all users. Therefore, a frequency offset compensation scheme without feedback transmission is sometimes preferable. In this paper, we propose a frequency offset compensation scheme without feedback transmission. To compensate for frequency offset in every transmitted signal, the multiplexed received signals must be separated into each user's component before the offset compensation. Thus, we adopt the principle of the parallel interference cancellation (PIC). By employing PIC, the received signals can be separated before the offset compensation. Thus, the frequency offset of every user's signal can be compensated for. Simulation results show the bit error rate performance of the proposed scheme attains almost the same as that of the conventional scheme using the feedback transmission without errors.

• 一般社団法人電子情報通信学会の論文
• 2006-10-01

著者

• Saba Takahiko

  Department Of Computer Science Chiba Institute Fo Technology

• Egashira Naoto

  Department Of Computer Science Chiba Institute Of Technology

関連論文

• Improvement of CCI and Residual Frequency Offset Compensation Using Feedback Phase Tracking in MIMO-OFDM Systems(Wireless Communication Technologies)
• Improvement of BPSK Space-Time Turbo Code with Full Rate and Full Antenna Diversity(Special Section on Information Theory and Its Applications)
• Improvement of BPSK Space-Time Turbo Code
• Frequency Offset Compensation Scheme Using Interference Cancellation in Reverse Link of OFDM/SDMA Systems(Coding Theory,Information Theory and Its Applications)
• Modified SC-Type Turbo Detection Using SISO-MLD for CCI Suppression in SDM-OFDM Systems(Information Theory and Its Applications)

スポンサーリンク