WALSH
鐮佹槸涓�绉嶅悓姝ユ浜ょ爜锛?/p>
鍗冲湪鍚屾浼犺緭鎯呭喌涓?/p>
,
鍒╃敤
Walsh
鐮佷綔涓哄湴鍧�鐮佸叿鏈?/p>
鑹ソ鐨勮嚜鐩稿叧鐗规�у拰澶勫涓洪浂鐨勪簰鐩稿叧鐗规�с�傛澶栵紝
Walsh
鐮佺敓鎴愬鏄?/p>
,
搴旂敤鏂逛究銆?/p>
姝ｅ悜閾捐矾鐨勪竴涓噸瑕佺壒鐐规槸浣跨敤
Walsh
鐮併�傝繖浜涗唬鐮佸叿鏈夊疄鐜版浜ゅ拰閫昏緫
鈥?/p>
闈?/p>
鈥?/p>
鎵�闇�瑕?/p>
鐨勭壒鎬с�?/p>
Walsh
鐮佺粍鐢变笅闈?/p>
鎵�绀虹殑
Hadamard
鐭╅樀灞曞紑浜х敓銆?/p>
Wn Wn
W2n = ---- ----
Wn Wn
灞曞紑寮忎腑鐨勫彉閲?/p>
n
蹇呴』鏄?/p>
2
鐨勫箓銆傚畠婧愪簬鐭╅樀涓殑涓�椤癸細
W1 = 0
鎶婃暣涓竴缁勬斁鍏ュ墠涓変釜鐭╅樀浣嶇疆锛岀劧鍚庢妸鍙嶈浆缁勬斁鍏ュ彸涓嬬煩闃典綅缃紝鍗充骇鐢熸洿楂橀樁鐨?/p>
Walsh
鐮佺粍銆?/p>
%
浜х敓
Walsh
鍑芥暟閫氱敤鍑芥暟
%
鍙傛暟
N
琛ㄧず
Walsh
鍑芥暟闃舵暟
,
褰?/p>
N
涓嶆槸
2
鐨勫箓鏃?/p>
,
閫氳繃鍚?/p>
鏃犵┓澶?/p>
鍙栨暣浣垮緱鎵�寰?/p>
Walsh
闃舵暟
涓?/p>
2
鐨勫箓
function [walsh]=walsh(N)
M=ceil(log2(N));
wc=zeros(N,N);
wn=0;
for i=1:M
w2n=[wn,wn;wn,~wn];
wn=w2n;
end
walsh=wn;
Walsh
鐮?/p>
(
娌冨皵浠�搴忓垪
)
Walsh
鐮佹潵婧愪簬
H
鐭╅樀锛屾牴鎹?/p>
H
鐭╅樀涓?/p>
鈥?1鈥?/p>
鍜?/p>
鈥?/p>
锛?/p>
1鈥?/p>
鐨勪氦鍙樻鏁伴噸鏂版帓鍒楀氨鍙互寰楀埌
Walsh
鐭╅樀锛?/p>
璇ョ煩闃典腑鍚勮鍒椾箣闂存槸鐩镐簰姝ｄ氦
(Mutual Orthogonal)
鐨勶紝
鍙互淇濊瘉浣跨敤瀹冩墿棰?/p>
鐨勪俊閬撲篃鏄簰鐩告浜ょ殑銆傚浜?/p>
CDMA
鍓嶅悜閾捐矾锛岄噰鐢?/p>
64
闃?/p>
Walsh
搴忓垪鎵╅锛?/p>
姣忎釜
W
搴?/p>
鍒楃敤浜庝竴绉嶅墠鍚戠墿鐞嗕俊閬?/p>
(
鏍囧噯锛夛紝瀹炵幇鐮佸垎澶氬潃鍔熻兘銆備俊閬撴暟璁颁负
W0-W63
锛岀爜鐗囬�熺巼锛?/p>
1.2288Mc/S
銆傛矁灏斾粈搴忓垪鍙互娑堥櫎鎴栨姂鍒跺鍧�骞叉壈
(MAI)
銆傜悊璁轰笂锛屽鏋滃湪澶氬潃淇￠亾涓俊鍙?/p>
鏄浉浜掓浜ょ殑锛?/p>
閭ｄ箞澶氬潃骞叉壈鍙互鍑忓皯鑷抽浂銆?/p>
鐒惰�屽疄闄呬笂鐢变簬澶氬緞淇″彿鍜屾潵鑷叾浠栧皬鍖虹殑淇?/p>
鍙蜂笌鎵�闇�淇″彿鏄笉鍚屾鐨勶紝
鍏变俊閬撳共鎵颁笉浼氫负闆躲�?/p>
寮傛鍒拌揪鐨勫欢杩熷拰琛板噺鐨勫寰勪俊鍙蜂笌鍚屾
鍒拌揪鐨勫師濮嬩俊鍙蜂笉鏄畬鍏ㄦ浜ょ殑锛?/p>
杩欎簺淇″彿灏卞甫鏉ュ共鎵般�?/p>
鏉ヨ嚜鍏朵粬灏忓尯鐨勪俊鍙蜂篃涓嶆槸鍚屾鎴?/p>
姝ｄ氦鐨勶紝杩欎篃浼氬鑷村共鎵板彂鐢?/p>
,
鍦ㄥ弽鍚戦摼璺腑锛屾矁灏斾粈鐮佸簭鍒椾粎鐢ㄤ綔鎵╅銆?/p>
2
浣滅敤
缂栬緫