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    • 1. 发明公开
    • 연판정 비트 검출 단일 복조기
    • 软位决策解调器
    • KR1020120104824A
    • 2012-09-24
    • KR1020110022460
    • 2011-03-14
    • 한국전자통신연구원전북대학교산학협력단
    • 정준영최동준허남호김영민김수영송상섭
    • H04L27/22H04L27/38H03M13/11
    • H04L25/067H04L27/0008
    • PURPOSE: A single demodulator for soft-decision bit detection is provided to reduce complexity by calculating a soft decision value of each bit only using one time simple distance calculation of a received symbol and a predetermined hard decision boundary value. CONSTITUTION: A demodulator calculates an I(In phase) channel value corresponding to a horizontal axis value and a Q(Quadrature) channel value corresponding to a vertical axis value in a process of mapping a symbol about a received signal by constellation(300). The demodulator determines the I channel value and the Q channel value as an initial soft-decision bit value for first and second bits(400). The demodulator cyclically calculates the initial soft-decision bit value for third and more bits based on the initial soft-decision bit value for the first and second bits(500). The demodulator multiplies a gain to all initial soft-decision bit values calculated by a detection flow chart(600). [Reference numerals] (300) Calculation of an I(In phase) channel value (Re{s}) and a Q(Quadrature) channel value (Im{s}) for a received signal; (400) Initial soft-decision bit value for first and second bits; b1=Re{S}, b2=Im{s}; (500) Repetitive calculation of the initial soft-decision bit value for a third bit based on the initial soft-decision bit value of the first and second bits; (600) Multiplying all calculated initial soft-decision bit values by a gain; bj=2/σ^2|H|bj,|
    • 目的:提供用于软判决比特检测的单个解调器,以通过仅使用接收符号的一次简单距离计算和预定硬判决边界值来计算每个比特的软判决值来降低复杂度。 构成:在通过星座图(300)映射关于接收信号的符号的处理的过程中,解调器计算对应于水平轴值的I(相位)通道值和对应于垂直轴值的Q(正交)通道值。 解调器将I信道值和Q信道值确定为第一和第二比特(400)的初始软判决比特值。 解调器基于第一和第二比特(500)的初始软判决比特值,循环地计算第三和更多比特的初始软判决比特值。 解调器将增益乘以由检测流程图(600)计算的所有初始软判决比特值。 (附图标记)(300)对于接收信号计算I(同相)信道值(Re {s})和Q(正交)信道值(Im {s}); (400)第一位和第二位的初始软判决位值; b1 = Re {S},b2 = Im {s}; (500)基于第一和第二比特的初始软判决比特值重复计算第三比特的初始软判定比特值; (600)将所有计算的初始软判决比特值乘以增益; BJ = 2 /σ^ 2 | H | BJ,| <= j的<= log2M