Training Sequence-aided QRM-ML Block Signal Detection for Single-carrier MIMO Multiplexing
نویسندگان
چکیده
あらまし QR 分解と M アルゴリズムを利用した演算量削減型最尤ブロック信号検出(QRM-MLBD)は,最小平均 二乗誤差(MMSE)規範に基づく空間フィルタリングに比べてサイクリックプリフィックス(CP)を用いるシングルキ ャリア(SC)マルチ送受信アンテナ(MIMO)多重伝送のパケット誤り率(PER)特性を大幅に改善できる.しかしながら, 十分な特性改善効果を得るためには,M アルゴリズムにおける生き残りパス数 M の値を非常に大きくする必要があ り,その結果,演算量が膨大となる.一方,M の値を小さくすると,M アルゴリズムの初期ステージで正しいパス を削除してしまう確率が増加するため,PER 特性が劣化する.本報告では,この問題を解決できる手法として,既 知系列を利用した SC-MIMO 多重 (TA-SC MIMO 多重)を用い,その既知系列を利用した QRM-MLBD を提案する. 計算機シミュレーションにより, 16QAM を用いる 4×4MIMO 多重の場合,QRM-MLBD を用いる TA-SC MIMO 多 重は,M=16 程度で M=1024 とした従来の QRM-MLBD を用いる CP-SC MIMO 多重と同等の PER 特性を達成できる
منابع مشابه
Throughput Performance of SC-MIMO HARQ Using Training Sequence Aided Near ML Block Detection
Very high-speed and high-quality packet transmissions in a limited bandwidth can be achieved by the joint use of multiinput multi-output (MIMO) multiplexing and hybrid automatic repeat request (HARQ). However, if single-carrier (SC) transmission is used, the transmission performance significantly degrades due not only to an inter-antenna interference (IAI) but also to an inter-symbol interferen...
متن کاملComplexity Reduced QRM-ML Block Signal Detections for Single-carrier Transmission
Maximum likelihood block signal detection with QR decomposition and M-algorithm (QRM-MLBD) can significantly improve the bit error rate (BER) performance of cyclic prefix-added single-carrier (CP-SC) block transmission when compared to the frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion. However, in order to achieve the sufficiently improved performan...
متن کاملMIMO-OFDM Transmission Using Complexity Reduced Near ML Detection
Abstract—QR decomposition and M-algorithm based near maximum likelihood detection (QRM-MLD) is a promising detection scheme for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM). However, QRM-MLD requires still high computational complexity. Recently, we proposed a complexity reduced 2-step QRM-MLD for single-carrier (SC) block transmissions. The complexity...
متن کاملSingle-carrier Transmission Using Qrm-mld with Antenna Diversity
The frequency-domain received single-carrier (SC) signal can be expressed using the matrix representation similar to the multiple-input multiple-output (MIMO) multiplexing. The signal detection schemes developed for MIMO multiplexing can be applied to the SC transmissions. In this paper, we apply maximum likelihood detection employing QR decomposition and M-algorithm (QRM-MLD) to the SC signal ...
متن کاملFrequency-Domain Block Signal Detection with QRM-MLD for Training Sequence-Aided Single-Carrier Transmission
A frequency-domain block signal detection (FDBD) using QR decomposition with M-algorithm maximum likelihood detection (QRM-MLD) can significantly improve the bit error rate (BER) performance of the cyclic prefix inserted single-carrier (CP-SC) block transmission in a frequency-selective fading channel. However, the use of a fairly large number of the surviving paths is required in the M-algorit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2010