Multi-Stage RLS OFDM Adaptive Array Antenna with Short Pilot Symbols
Summary :
Post-FFT type orthogonal frequency division multiplexing (OFDM) adaptive array antennas can reduce the co-channel interference with a few antenna elements under multi-path fading environments. However, the Post-FFT type OFDM adaptive array antennas require a lot of pilot symbols in order to determine the optimal weights in each subcarrier. In packet communication systems, since the data are transmitted burst by burst, the ratio of the effective data in a channel decreases when the long pilot symbols are used. Recursive least squares (RLS) algorithm is one of the weight optimization algorithm with fast convergence based on minimum mean square errors (MMSE). However, the optimal weight determination with a few pilot symbols is difficult. Therefore, in this paper, we propose a novel multi-stage RLS OFDM adaptive array antenna for realizing weight determination with a few pilot symbols. In the proposed method, the weights are optimized by using a multiple stage structure with the stored pilot symbols. Here, the initial weights and the initial inverse matrix of correlation matrix are decided by the results of the weight determination in the adjacent subcarriers of the previous stage. As a result, the weight determination with a few pilot symbols can be achieved.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E89-B No.5 pp.1589-1597
- Publication Date
- 2006/05/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1093/ietcom/e89-b.5.1589
- Type of Manuscript
- PAPER
- Category
- Wireless Communication Technologies
Authors
Keyword
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Takeo FUJII, Yukihiro KAMIYA, Yasuo SUZUKI, "Multi-Stage RLS OFDM Adaptive Array Antenna with Short Pilot Symbols" in IEICE TRANSACTIONS on Communications,
vol. E89-B, no. 5, pp. 1589-1597, May 2006, doi: 10.1093/ietcom/e89-b.5.1589.
Abstract: Post-FFT type orthogonal frequency division multiplexing (OFDM) adaptive array antennas can reduce the co-channel interference with a few antenna elements under multi-path fading environments. However, the Post-FFT type OFDM adaptive array antennas require a lot of pilot symbols in order to determine the optimal weights in each subcarrier. In packet communication systems, since the data are transmitted burst by burst, the ratio of the effective data in a channel decreases when the long pilot symbols are used. Recursive least squares (RLS) algorithm is one of the weight optimization algorithm with fast convergence based on minimum mean square errors (MMSE). However, the optimal weight determination with a few pilot symbols is difficult. Therefore, in this paper, we propose a novel multi-stage RLS OFDM adaptive array antenna for realizing weight determination with a few pilot symbols. In the proposed method, the weights are optimized by using a multiple stage structure with the stored pilot symbols. Here, the initial weights and the initial inverse matrix of correlation matrix are decided by the results of the weight determination in the adjacent subcarriers of the previous stage. As a result, the weight determination with a few pilot symbols can be achieved.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e89-b.5.1589/_p
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@ARTICLE{e89-b_5_1589,
author={Takeo FUJII, Yukihiro KAMIYA, Yasuo SUZUKI, },
journal={IEICE TRANSACTIONS on Communications},
title={Multi-Stage RLS OFDM Adaptive Array Antenna with Short Pilot Symbols},
year={2006},
volume={E89-B},
number={5},
pages={1589-1597},
abstract={Post-FFT type orthogonal frequency division multiplexing (OFDM) adaptive array antennas can reduce the co-channel interference with a few antenna elements under multi-path fading environments. However, the Post-FFT type OFDM adaptive array antennas require a lot of pilot symbols in order to determine the optimal weights in each subcarrier. In packet communication systems, since the data are transmitted burst by burst, the ratio of the effective data in a channel decreases when the long pilot symbols are used. Recursive least squares (RLS) algorithm is one of the weight optimization algorithm with fast convergence based on minimum mean square errors (MMSE). However, the optimal weight determination with a few pilot symbols is difficult. Therefore, in this paper, we propose a novel multi-stage RLS OFDM adaptive array antenna for realizing weight determination with a few pilot symbols. In the proposed method, the weights are optimized by using a multiple stage structure with the stored pilot symbols. Here, the initial weights and the initial inverse matrix of correlation matrix are decided by the results of the weight determination in the adjacent subcarriers of the previous stage. As a result, the weight determination with a few pilot symbols can be achieved.},
keywords={},
doi={10.1093/ietcom/e89-b.5.1589},
ISSN={1745-1345},
month={May},}
Copy
TY - JOUR
TI - Multi-Stage RLS OFDM Adaptive Array Antenna with Short Pilot Symbols
T2 - IEICE TRANSACTIONS on Communications
SP - 1589
EP - 1597
AU - Takeo FUJII
AU - Yukihiro KAMIYA
AU - Yasuo SUZUKI
PY - 2006
DO - 10.1093/ietcom/e89-b.5.1589
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E89-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2006
AB - Post-FFT type orthogonal frequency division multiplexing (OFDM) adaptive array antennas can reduce the co-channel interference with a few antenna elements under multi-path fading environments. However, the Post-FFT type OFDM adaptive array antennas require a lot of pilot symbols in order to determine the optimal weights in each subcarrier. In packet communication systems, since the data are transmitted burst by burst, the ratio of the effective data in a channel decreases when the long pilot symbols are used. Recursive least squares (RLS) algorithm is one of the weight optimization algorithm with fast convergence based on minimum mean square errors (MMSE). However, the optimal weight determination with a few pilot symbols is difficult. Therefore, in this paper, we propose a novel multi-stage RLS OFDM adaptive array antenna for realizing weight determination with a few pilot symbols. In the proposed method, the weights are optimized by using a multiple stage structure with the stored pilot symbols. Here, the initial weights and the initial inverse matrix of correlation matrix are decided by the results of the weight determination in the adjacent subcarriers of the previous stage. As a result, the weight determination with a few pilot symbols can be achieved.
ER -
English
