JP2013046131A5 - - Google Patents

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JP2013046131A5
JP2013046131A5 JP2011181272A JP2011181272A JP2013046131A5 JP 2013046131 A5 JP2013046131 A5 JP 2013046131A5 JP 2011181272 A JP2011181272 A JP 2011181272A JP 2011181272 A JP2011181272 A JP 2011181272A JP 2013046131 A5 JP2013046131 A5 JP 2013046131A5
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pilot
channel
cir
estimating
received signal
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直交周波数分割多重化（ＯＦＤＭ）ネットワークにおいて時間変化的および周波数選択的なチャネルを推定するための方法であって、
１組のＯＦＤＭシンボルの１組のパイロットトーンに対応する受信信号を、受信機でバッファに格納すること、ここで、前記パイロットトーンはあらかじめ決められて、前記ＯＦＤＭシンボルの周波数搬送波およびタイムスロットに挿入され、
前記受信信号の共分散行列を推定すること、
前記共分散行列および前記受信信号におけるノイズのバリアンスに基づいて、圧縮検出を用いて、対角行列Ｑを推定すること、ここで、前記対角行列は時間領域における非零経路の遅延を示し、
前記対角行列および前記受信信号を使用して、次式
Figure 2013046131
 に基づき、各ＯＦＤＭシンボルｋに対するチャネルインパルス応答（ＣＩＲ）
Figure 2013046131
 を、複数のＯＦＤＭシンボルに亘って共同で推定すること、ここで、
Figure 2013046131
 は、ｋ番目のＯＦＤＭシンボルでの実際の係数利得のベクトルであり、
チャネル周波数応答（ＣＦＲ）を得るために、前記ＣＩＲを前記周波数領域へ変形すること、
を備える、方法。 A method for estimating time-varying and frequency-selective channels in an orthogonal frequency division multiplexing (OFDM) network, comprising:
A received signal corresponding to a set of pilot tones of a set of OFDM symbols is stored in a buffer at a receiver, where the pilot tones are predetermined and inserted into the frequency carrier and time slot of the OFDM symbol And
Estimating a covariance matrix of the received signal;
Estimating a diagonal matrix Q using compression detection based on the variance of the covariance matrix and noise in the received signal, where the diagonal matrix indicates a non-zero path delay in the time domain;
Using said diagonal matrix and the received signal, the following equation
Figure 2013046131
 Based on the channel impulse response for each OFDM symbol k (CIR)
Figure 2013046131
 Jointly over multiple OFDM symbols , where
Figure 2013046131
 Is a vector of actual coefficient gains in the kth OFDM symbol,
To obtain a switch Yaneru frequency response (CFR), to deform the CIR into the frequency domain,
A method comprising: 前記パイロットトーンの組は、送信機で、一様に且つランダムに伝送信号に挿入される、請求項１の方法。   The method of claim 1, wherein the set of pilot tones is uniformly and randomly inserted into a transmitted signal at a transmitter. 単一のＯＦＤＭシンボルの前記パイロットトーンの組の中のパイロット副搬送波の数は、前記チャネルにおける遅延経路の数に依存し、ここで、前記遅延経路は非零であり重要である、請求項１の方法。 Pilot number of subcarriers in the set of the pilot tones of a single OFDM symbol is dependent on the number of delay paths in the channel, wherein said delay path is important is non-zero, claim 1 method. 前記パイロット副搬送波の数は、前記チャネルにおけるドップラースプレッドに依存する、請求項３の方法。 The method of claim 3, wherein the number of pilot subcarriers depends on a Doppler spread in the channel. 前記パイロット副搬送波の数は、前記受信機のモビリティに依存する、請求項３の方法。 4. The method of claim 3, wherein the number of pilot subcarriers depends on the mobility of the receiver. 前記パイロット副搬送波の数は、前記受信機が動作する環境に依存する、請求項３の方法。 4. The method of claim 3, wherein the number of pilot subcarriers depends on the environment in which the receiver operates. 前記ＣＩＲは、圧縮検出プロセスを使用して推定される、請求項１の方法。   The method of claim 1, wherein the CIR is estimated using a compression detection process. 前記ＣＩＲを推定することは、前記ＯＦＤＭシンボルの組に亘って共同で行われる、請求項１の方法。   The method of claim 1, wherein estimating the CIR is performed jointly over the set of OFDM symbols. 瞬時チャネル利得が時間変化的である場合でも、前記チャネルの電力遅延プロファイルは固定される、請求項１の方法。   The method of claim 1, wherein the power delay profile of the channel is fixed even if the instantaneous channel gain is time-varying.
JP2011181272A 2011-08-23 2011-08-23 Method for estimating time-varying and frequency-selective channels Pending JP2013046131A (en)

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JP2015095712A (en) 2013-11-11 2015-05-18 富士通株式会社 Receiver and reception method
JP6513047B2 (en) * 2016-03-25 2019-05-15 Kddi株式会社 Receiver for receiving mode multiplexed optical signal, and method of measuring relative delay of optical signal in the receiver
KR20210051011A (en) 2019-10-29 2021-05-10 삼성전자주식회사 Method and apparatus for channel estimation for ofdm based single carrier system

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ATE223122T1 (en) * 1998-11-18 2002-09-15 Nokia Corp METHOD FOR IMPROVED ESTIMATION OF CHANNEL PULSE RESPONSE IN TDMA SYSTEMS
US6587526B1 (en) * 1999-10-12 2003-07-01 Lucent Technologies Inc. Apparatus and method for timing synchronization in OFDM-based wireless systems
US6947748B2 (en) * 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
US20020176485A1 (en) * 2001-04-03 2002-11-28 Hudson John E. Multi-cast communication system and method of estimating channel impulse responses therein
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US8325863B2 (en) * 2004-10-12 2012-12-04 Qualcomm Incorporated Data detection and decoding with considerations for channel estimation errors due to guard subbands
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