Communications_Engineer
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walsh matrix matlab
Hello, I have a question for my fellow members, we have studied that for CDMA, lets take CDMA2000, we modulo-2 add (or simply XOR) our data sequence with our Walsh sequence (albeit at a higher rate). However, in the CDMA2000 demo and the WCDMA demo in Simulink and also in some Matlab CDMA codes that I got, we have only performed simple multiplication.
Surely, this cant be right can it?
Secondly, the spreading is performed after modulation, however, all standards say that spreading be performed before modulation. So why is this?
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groups.yahoo.com/group/telecom_research
Hello, I have a question for my fellow members, we have studied that for CDMA, lets take CDMA2000, we modulo-2 add (or simply XOR) our data sequence with our Walsh sequence (albeit at a higher rate). However, in the CDMA2000 demo and the WCDMA demo in Simulink and also in some Matlab CDMA codes that I got, we have only performed simple multiplication.
Surely, this cant be right can it?
Secondly, the spreading is performed after modulation, however, all standards say that spreading be performed before modulation. So why is this?
-----------------------------------------------------------------------------------------------
groups.yahoo.com/group/telecom_research
