Spreading code construction for CDMA |
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Authors: | Zhenning Shi Schlegel C. |
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Affiliation: | Dept. of Electr. & Comput. Eng., Univ. of Utah, Salt Lake City, UT, USA; |
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Abstract: | In this letter, we use the well-known Walsh-Hadamard codes to construct larger sets of linearly dependent codes such that their matrix of correlations is band-diagonal. Optimal detection for systems employing these spreading codes can be efficiently accomplished by a trellis decoder. Analysis and simulation show that with a processing gain of N, up to 2N users can be accommodated without much performance degradation. This proposed approach is quite general and larger code set can be constructed analogously. |
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