Generating near-white ultra-wideband signals with period extended PN sequences

摘要: Ultra-wideband technology promises unique advantages over conventional narrowband communications systems. However, the potential interference of ultra-wideband devices to existing systems is an issue serious concerns. The mathematical models for describing two impulse modulation schemes, namely biphase and hybrid modulation, are reviewed. A period extension method implementations PN sequence in train used generate ultrawideband signal proposed. Considerable reduction power spectral density level can be obtained by use this technique. An example using m-sequence given, which demonstrates a near-white spectrum.