公开(公告)号：JP2013240102A

公开(公告)日：2013-11-28

申请号：JP2013156604

申请日：2013-07-29

Applicant: Telefon Ab L M Ericsson ,  テレフオンアクチーボラゲット エル エム エリクソン(パブル)

Inventor： DOUGLAS A CAIRNS ,  ELIAS JONSSON

IPC: H04L27/34 ,  H04B1/7117 ,  H04B1/712 ,  H04L27/01

CPC classification number: H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

Abstract: PROBLEM TO BE SOLVED: To provide a receiver and a method for receiving and processing a series of symbols transmitted in a digital communication system utilizing soft pilot symbols.SOLUTION: Since the remaining symbols in a series are modulated by a high-order modulation method of 16QAM, 64QAM, or the like, and soft pilot symbols are modulated by a lower-order modulation method of BPSK, QPSK, or the like, a soft pilot symbol set is transmitted with reliability higher than that of the remaining symbols in a series. A modulation system and a position (time/frequency/code) of the soft pilot symbol set are known for a receiver, and the receiver demodulates the soft pilot symbol at first, and uses as a known symbol thus estimating parameters of a received wireless signal. The soft pilot carries data furthermore. In addition, the soft pilot is especially useful for establishing an amplitude reference essential for demodulation of higher-order modulation symbols.

Abstract translation: 要解决的问题：提供一种用于接收和处理利用软导频符号在数字通信系统中发送的一系列符号的接收机和方法。解决方案：由于一系列中的剩余符号由高阶调制方法 16QAM，64QAM等，并且通过BPSK，QPSK等的低阶调制方法来调制软导频符号，从而可靠地发送比其余符号的序列更可靠的软导频符号集。 接收机已知软导频符号集的调制系统和位置（时间/频率/码），接收机首先对软导频符号进行解调，并将其用作已知符号，从而估计接收到的无线信号的参数 。 软导频进一步传送数据。 另外，软导频对于建立高阶调制符号解调所需的幅度参考是特别有用的。