Spread spectrum communications handbook (revised ed.)
Spread spectrum communications handbook (revised ed.)
Wireless digital communications: modulation & spread spectrum applications
Wireless digital communications: modulation & spread spectrum applications
Spread Spectrum Systems: With Commercial Applications
Spread Spectrum Systems: With Commercial Applications
Coherent Spread Spectrum System
Coherent Spread Spectrum System
Modern Communications and Spread Spectrum
Modern Communications and Spread Spectrum
Digital Communications and Spread Spectrum System
Digital Communications and Spread Spectrum System
Adaptive Wcdma
Provisioning multimedia wireless networks for better QoS: RRM strategies for 3G W-CDMA
IEEE Communications Magazine
Power line communications: state of the art and future trends
IEEE Communications Magazine
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A new class of pseudonoise even balanced (PN-EB) binary spreading sequences is derived from existing classical odd-length families of maximum-length sequences, such as those proposed by Gold, by appending or inserting one extra-zero element (chip) to the original sequences. The incentive to generate large families of PN-EB spreading sequences is motivated by analyzing the spreading effect of these sequences from a natural sampling point of view. From this analysis a new definition for PG is established, from which it becomes clear that very high processing gains (PGs) can be achieved in band-limited direct-sequence spread-spectrum (DSSS) applications by using spreading sequences with zero mean, given that certain conditions regarding spectral aliasing are met. To obtain large families of even balanced (i.e., equal number of ones and zeros) sequences, two design criteria are proposed, namely the ranging criterion (RC) and the generating ranging criterion (GRC). PN-EB sequences in the polynomial range 3 ≤ n ≤ 6 are derived using these criteria, and it is shown that they exhibit secondary autocorrelation and cross-correlation peaks comparable to the sequences they are derived from. The methods proposed not only facilitate the generation of large numbers of new PN-EB spreading sequences required for CDMA applications, but simultaneously offer high processing gains and good despreading characteristics in multiuser SS scenarios with band-limited noise and interference spectra. Simulation results are presented to confirm the respective claims made.