あらまし 次世代移動無線通信システムで要求される数ギガビット毎秒のデータ通信の実現には厳しい周波数選 択性チャネルの克服が必須である.周波数領域拡散を用いるマルチキャリア(MC)符号分割多元接続(CDMA)伝送で は,最小平均二乗誤差(MMSE)規範に基づく 1 タップの周波数領域受信等化(受信 MMSE-FDE)を用いることで優れ た伝送特性を実現できることが知られている.ところで,送信機がチャネル情報を有しているときには,MMSE規 範に基づく 1タップの周波数領域送信等化(送信MMSE-FDE)が適用可能であることが示されている.筆者らは,チ ャネル情報を送受信機が共有している場合に送受信機でそれぞれ 1 タップの FDE を行うジョイント送信/受信 MMSE-FDEを提案してきた.本稿ではMC-CDMA伝送を対象に,これら 3種のMMSE-FDEの比較と考察を行う. それぞれ...

Two-port demodulation reference signals (DMRS) have been employed in new radio (NR) recently. In this paper, we firstly propose a minimum mean square error (MMSE) scheme with full priori knowledge (F-MMSE) to achieve the channel estimation of two-port DMRS NR. When two ports are assigned different users, is not easy be obtained for one user. Then, present MMSE partial (P-MMSE). Finally, numeric...

OBJECTIVE To follow up the long-term functioning in a community through assessing personal background and status based on the International Classification of Functioning, Disability and Health (ICF) after a stroke, by using a Korean version of World Health Organization Disability Assessment Scale II (K-WHODAS II). METHODS We surveyed 146 patients diagnosed at the first-onset of acute stroke a...

We systematically analyze the biased and unbiased minimum mean square error (MMSE) equalizers of finite as well as infinite length, with and without decision feedback sections. New closed-form expressions of optimum equalizer weights, the MMSE, and symbol error probabilities (SEP), solely in terms of channel response parameters and noise power, are derived for the above receivers. These new exp...

background and purpose: cognitive impairment (ci) is one of the causes of disabilities in multiple sclerosis patients (ms). therefore, early detection and evaluation of cognitive performance is very important in patients with ms. the aim of the present study is to compare montreal cognitive assessment (moca) test and mini mental status exam (mmse) in relapsing remitting (rr) ms patients. method...

We first develop a reduced-rank minimum mean square error (MMSE) detector for direct-sequence (DS) code division multiple access (CDMA) by forcing the linear MMSE detector to lie in a signal subspace of a reduced dimension. While a reduced-rank MMSE detector has lower complexity, it cannot outperform the full-rank MMSE detector. We then concentrate on the blind reduced-rank MMSE detector which ...