Power and spectrally efficient four-dimensional super-orthogonal WCDMA building block for next generation wireless applications

Author

Linde, Louis P. ; Vlok, Jacobus D.

Author_Institution

Dept. of Electr., Electron. & Comput. Eng., Pretoria Univ.

Volume

10

Issue

7

fYear

2006

fDate

7/1/2006 12:00:00 AM

Firstpage

519

Lastpage

521

Abstract

This letter introduces a versatile multi-code multidimensional super-orthogonal wideband code division multiple access (MC-MD-SO- WCDMA) multi-layered-modulation (MLM) scheme, employing families of root-of-unity filtered (RUF) generalized-chirp-like (GCL) constant-envelope complex spreading sequences (GCL-CE-CSS), including recently derived families of super-orthogonal (SO) GCL-CE-CSS with zero cross-correlation (ZCC) properties. The latter sequences facilitate multi-user-interference (MUI) free demodulation and detection. It is shown that the resulting MC-MD-SO-WCDMA signal simultaneously exhibits a spectrally efficient minimum (Nyquist) bandwidth output power spectral density (PSD) and a near constant instantaneous power output signal, yielding significant spectral and power efficiency advantages over existing single and multi-carrier multi-level quadrature-amplitude-modulated (M-QAM) WCDMA and OFDM modulation standards.

Keywords

3G mobile communication; OFDM modulation; broadband networks; code division multiple access; correlation methods; demodulation; modulation coding; multidimensional signal processing; quadrature amplitude modulation; radiofrequency filters; radiofrequency interference; signal detection; GCL; GCL-CE-CSS; M-QAM; MC-MD-SO- WCDMA; MLM; MUI; OFDM modulation standard; PSD; RUF; ZCC; constant-envelope complex spreading sequence; free demodulation-detection; generalized-chirp-like sequence; multicode multidimensional scheme; multilayered-modulation scheme; multilevel quadrature-amplitude-modulation; multiuser-interference; power efficiency; power spectral density; root-of-unity filter; super-orthogonal wideband code division multiple access; wireless application; zero cross-correlation property; Bandwidth; Bit error rate; Cascading style sheets; Multiaccess communication; Multicarrier code division multiple access; Multidimensional systems; OFDM modulation; Peak to average power ratio; Pulse modulation; Wideband;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOM.2006.224406

Filename

1672999