| 著者 |
澤田学，岡田啓，山里敬也，片山正昭 |
| 題目 |
OFDM受信機におけるADCの非線形性の影響の軽減手法に関する検討 |
| 出典 |
デンソーテクニカルレビュー, vol.11, no.1, pp.115-120, |
| 要約 |
直交周波数分割多重（OFDM）は，周波数利用効率や耐周波数選択性フェージング特性に優れた方式であり，高速無線LANシステムや地上波ディジタル放送に採用されている．本論文では，OFDM受信機において生じるアナログ−ディジタル変換器（ADC）の非線形性によるビット誤り率（BER）特性の劣化に対し，簡易な構成でこの影響を軽減できる受信機を考案し，その有効性を示した． |
| Authors |
M. Sawada, H. Okada, T. Yamazato, M. Katayama |
| Title |
A study on the mitigation of the influence of ADC nonlinearity in an OFDM receiver |
| Authority |
DENSO TECHNICAL REVIEW, vol.11, no.1, pp.115-120, |
| Summary |
An orthogonal frequency division multiplexing (OFDM) scheme,
with highly spectrum efficiency and robustness against frequency selective fading,
is applied to IEEE802.11a/g for high-speed wireless local area network (LAN) systems
and digital terrestrial television broadcasting (DTTB) systems.
The OFDM signal has large fluctuation in its amplitude, large dynamic range and high linearity
are required for its transmitter and receiver.
In the receiver, the Bit Error Rate (BER) performance is degraded by analog-to-digital converter (ADC) nonlinearity.
We propose a new scheme to mitigate the influence of ADC nonlinearity in an OFDM receiver.
In the proposed receiver, the weight for the soft Viterbi decoder is controlled based on the ADC output amplitude.
We evaluate the BER performance for the proposed receiver when the control errors occur in the AGC amplifier.
As a result, the effect of the proposed receiver on the BER performance is shown. |
| 年月 |
2006年5月 |
| DOI/Handle |
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| 開催場所 |
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| 研究テーマ |
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| 言語 |
日本語 |
| 原稿/プレゼン資料 |
無し / 無し (ローカル限定) |
