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Subcarrier Block Power Control for Adaptive Downlink OFDM with Frequency Spreading and Equalization
Nam-Su KIM Sungho CHO Chang-Jun AHN
Publication
IEICE TRANSACTIONS on Communications
Vol.E89-B
No.7
pp.2102-2105 Publication Date: 2006/07/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.7.2102 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: subcarrier block power control, frequency symbol spreading, MMSEC,
Full Text: PDF(345.8KB)>>
Summary:
In this letter, we propose the transmit power controlled adaptive downlink frequency symbol spreading OFDM (TPC-AMS/FSS-OFDM) system. In the TPC-AMS/FSS-OFDM, each S/P transformed signal is spread by orthogonal spreading codes and combined in the transmitter, so the detected signals obtain the same SINR for each frequency symbol spreading block in the receiver. In this case, we can assign the same modulation level and transmit power for each frequency symbol spreading block for next transmission. Thus, the proposed system not only increases throughput performance but also reduces the total transmit power, FBI and MLI.
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