JP2011526435A - ソフトパイロットシンボルを用いる無線信号を処理するための受信機および方法 - Google Patents
ソフトパイロットシンボルを用いる無線信号を処理するための受信機および方法 Download PDFInfo
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Abstract
【選択図】図1
Description
この出願は、2008年6月17日に提出された米国の仮出願第61/073,264号の利益を主張し、当該仮出願の開示は、全体として参照によりここに取り入れられる。
ソフトパイロットの導入は、送信信号が搬送することができるチャネル符号化されたビットの数を減少させる。チャネル符号化されたビットの減少は、以下に説明される2つの異なるアプローチにより実装されることが可能である。
図8は、本発明の例示的な実施形態におけるE−DCHについてのソフトパイロット生成プロセスを説明するフロー図である。HS−DSCHと同様の信頼性の識別を達成するために、物理レイヤHARQ機能性およびチャネルインターリービングにおけるビット収集手続きは、もしあれば系統的なターボ符号化されたビットをできる限り4PAMの第1のビットラベルにマッピングするように設計される。好ましい実施形態によると、ソフトパイロットシンボルは、E−DCHチャネルインターリービングの後に生成される。
ソフトパイロットシンボルは、同一の符号上、単一の別々の符号上、MIMO(Multiple-Input-Multiple-Output)システムにおける別々のアンテナ上、等に組み込まれ得る。ソフトパイロットシンボルが別々の符号および/またはアンテナ上で同時に発生し、または同時に発生しないように、配置が調整され得る。
Claims (20)
- 送信されるシンボルの系列を含む受信無線信号のパラメータを推定するための無線受信機における方法であって:
より高い信頼性で送信されるシンボルをまず復調し、ソフトパイロットシンボルを形成するステップと;
前記ソフトパイロットシンボルを既知のシンボルとして利用し、前記受信無線信号のパラメータを推定するステップと;
を含む方法。 - 前記ソフトパイロットシンボルは、前記系列内の残りのシンボルについて利用されるより高次の変調法よりもより低次の変調法を有する、請求項1に記載の方法。
- 前記ソフトパイロットシンボルを既知のシンボルとして利用する前記ステップは、前記ソフトパイロットシンボルを既知のシンボルとして利用し、より高次の変調シンボルを復調することも含む、請求項2に記載の方法。
- 前記パイロットシンボルは、一定の包む変調シンボルであり、前記ソフトパイロットシンボルを既知のシンボルとして利用する前記ステップは、前記ソフトパイロットシンボルを利用し、前記より高次の変調シンボルを復調するための振幅リファレンスを確立することも含む、請求項3に記載の方法。
- 前記ソフトパイロットシンボルは、四位相偏移変調(QPSK)または二位相偏移変調(BPSK)で変調され、前記系列内の前記残りのシンボルは、16値直交振幅変調(16QAM)または64QAMで変調される、請求項4に記載の方法。
- 前記方法は、前記ソフトパイロットシンボルについての前記系列内の予め定義された位置を示す情報を前記受信機内に予め記憶するステップをさらに含み、前記位置は、時間、周波数および符号の観点から定義される、請求項1に記載の方法。
- 前記ソフトパイロットシンボルについての変調方式を示す情報を前記受信機内に予め記憶するステップをさらに含む、請求項6に記載の方法。
- 前記方法は、前記ソフトパイロットシンボルについての前記系列内の位置を示す送信機からのシグナリングを受信するステップをさらに含み、前記位置は、時間、周波数および符号の観点から定義される、請求項1に記載の方法。
- 前記ソフトパイロットシンボルについての変調方式を示す前記送信機からのシグナリングを受信するステップをさらに含む、請求項8に記載の方法。
- 前記ソフトパイロットシンボルおよびより高次の変調シンボルの両方からデータを抽出するステップをさらに含む、請求項1に記載の方法。
- 送信されるシンボルの系列を含む受信無線信号を処理するためのG−Rake(generalized Rake)受信機における方法であって:
第1のパスにおける近似の合成重みのセットを算出するステップと;
前記系列内の残りのシンボルよりもより低次の変調法で変調される前記系列内のソフトパイロットシンボルのセットを識別するステップと;
前記近似の合成重みを利用して、前記ソフトパイロットシンボルに対応する逆拡散値をコヒーレントに合成し、シンボル推定値を生成するステップと;
送信について使用されるコンスタレーションを前提として、デコーダの関与なしに前記シンボル推定値についてのシンボルの硬判定を行うステップと;
前記シンボルの硬判定を復調パイロットとして利用し、障害共分散行列をノンパラメトリックに推定するステップと;
推定された前記障害共分散行列を利用して、第2のパスにおける精緻化された合成重みのセットを算出するステップと;
前記精緻化された合成重みを利用して、全てのトラフィックデータを合成するステップと;
を含む方法。 - 送信されるシンボルの系列を含む受信無線信号のパラメータを推定するための無線受信機であって:
前記系列内の残りのシンボルよりもより高い信頼性で送信される前記系列内のシンボルのセットを識別するための手段と;
識別された前記シンボルのセットをまず復調し、ソフトパイロットシンボルを形成するための手段と;
前記ソフトパイロットシンボルを既知のシンボルとして利用し、前記受信無線信号のパラメータを推定するための手段と;
を備える無線受信機。 - 前記ソフトパイロットシンボルは、四位相偏移変調(QPSK)または二位相偏移変調(BPSK)で変調され、前記系列内の前記残りのシンボルは、16値直交振幅変調(16QAM)または64QAMで変調される、請求項12に記載の無線受信機。
- 前記パイロットシンボルは、一定の包む変調シンボルであり、前記ソフトパイロットシンボルを既知のシンボルとして利用するための前記手段は、前記ソフトパイロットシンボルを利用し、より高次の変調シンボルを復調するための振幅リファレンスを確立するための手段を含む、請求項13に記載の無線受信機。
- 前記無線受信機は、前記ソフトパイロットシンボルについての変調方式および前記ソフトパイロットシンボルについての前記系列内の予め定義された位置を示す情報を予め記憶するための記憶手段をさらに備え、前記位置は、時間、周波数および符号の観点から定義される、請求項12に記載の無線受信機。
- 前記無線受信機は、前記ソフトパイロットシンボルについての前記系列内の位置を示す送信機からのシグナリングを受信するための手段をさらに備え、前記位置は、時間、周波数および符号の観点から定義される、請求項12に記載の無線受信機。
- 前記無線受信機は、前記ソフトパイロットシンボルについての変調方式および前記ソフトパイロットシンボルについての前記系列内の予め定義された位置を示す送信機からのシグナリングを受信するための手段をさらに備え、前記位置は、時間、周波数および符号の観点から定義される、請求項12に記載の無線受信機。
- 前記ソフトパイロットシンボルおよびより高次の変調シンボルの両方からデータを抽出するための手段をさらに備える、請求項12に記載の無線受信機。
- 送信されるシンボルの系列を含む受信無線信号を処理するための2パスのG−Rake(generalized Rake)受信機であって:
第1のパスにおける近似の合成重みのセットを算出するための手段と;
前記系列内の残りのシンボルよりもより低次の変調法で変調される前記系列内のソフトパイロットシンボルのセットを識別するための手段と;
前記近似の合成重みを利用して、前記ソフトパイロットシンボルに対応する逆拡散値をコヒーレントに合成し、シンボル推定値を生成するための手段と;
送信について使用されるコンスタレーションを前提として、デコーダの関与なしに前記シンボル推定値についてのシンボルの硬判定を行うための手段と;
前記シンボルの硬判定を復調パイロットとして利用し、障害共分散行列をノンパラメトリックに推定するための手段と;
推定された前記障害共分散行列を利用して、第2のパスにおける精緻化された合成重みのセットを算出するための手段と;
前記精緻化された合成重みを利用して、全てのトラフィックデータを合成するための手段と;
を備えるG−Rake受信機。 - 送信されるシンボルの系列を含む無線信号を送信するための送信機であって:
チャネル符号化されたビットを低レベルで間引くこと、および既知のビットパターンで置き換えることにより、ソフトパイロットシンボルのセットを挿入するための手段と;
前記系列を変調し、前記無線信号を送信するための手段と;
を備える送信機、および
前記無線信号を受信しおよび処理するための無線受信機であって:
前記無線信号を受信するための手段と;
前記ソフトパイロットシンボルのセットを識別するための手段と;
前記ソフトパイロットシンボルをまず復調するための手段と;
前記ソフトパイロットシンボルを既知のシンボルとして利用し、前記受信無線信号のパラメータを推定するための手段と;
を備える受信機、
を備える無線通信のためのシステム。
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US12/239,918 US8149929B2 (en) | 2008-06-17 | 2008-09-29 | Receiver and method for processing radio signals using soft pilot symbols |
US12/239,918 | 2008-09-29 | ||
PCT/IB2009/005944 WO2010004389A2 (en) | 2008-06-17 | 2009-06-15 | Receiver and method for processing radio signals using soft pilot symbols |
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