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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Chunjiang Zhao Qingsheng Yuan Chen He |
| Copyright Year | 2005 |
| Description | Author affiliation: Shanghai Jiao Tong Univ., China (Chunjiang Zhao; Qingsheng Yuan; Chen He) |
| Abstract | Multi-carrier code division multiple access system (MC-CDMA) is a flexible and adaptable radio interface to provide dynamically changing bit rates and a variety of services on radio channels. An accurate channel estimate allows the use of multi-user detection and power loading to improve system performance. In this paper, we propose a novel channel estimation method of uplink for MC-CDMA systems. In MC-CDMA systems, code-multiplexed pilot symbols are transmitted consecutively in both time and frequency domains. In the proposed method, weighted pilot symbols in both domains are coherently added to improve signal to noise ratio of pilot symbols in channel estimation. We propose a method to select the weighting factor for pilot symbols according to the changes of propagation by measuring the maximum Doppler shift and the maximum delay time. Also the channel estimation algorithm is simplified. The method is evaluated in the end. The results show that the method is simple and effective. |
| Starting Page | 549 |
| Ending Page | 552 |
| File Size | 318394 |
| Page Count | 4 |
| File Format | |
| ISBN | 078039335X |
| DOI | 10.1109/WCNM.2005.1544098 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2005-09-26 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Multiuser detection Doppler shift Multicarrier code division multiple access System performance Delay effects Bit rate Channel estimation Time measurement Frequency domain analysis Signal to noise ratio |
| Content Type | Text |
| Resource Type | Article |
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