Title :
JD-CDMA mobile station envelope characteristics and spectra results from a JD-CDMA testbed
Author :
Bahrenburg ; Euscher, C. ; Mayer, J. ; Schlee, J. ; Weber, T.
Author_Institution :
Siemens AG, Munich, Germany
Abstract :
The requirements on linearity and the power spectrum of TDMA/CDMA systems are an issue coming up in the standardisation process of the Universal Mobile Telecommunications System (UMTS) standard. The feasibility of transmitting QPSK and 16-QAM signals in multi-code operation with low cost terminals is questioned and the spectral artefacts due to the short code design are said to be unfavourable. A JD-CDMA hardware demonstrator was build to investigate the properties of joint-detection-CDMA in practice. In this paper measurement results and experiences with the demonstrator are presented. It is shown that even with low cost terminals the linearity and spectrum requirements can be fulfilled
Keywords :
cellular radio; code division multiple access; quadrature amplitude modulation; quadrature phase shift keying; spectral analysis; 16-QAM; JD-CDMA mobile station envelope characteristics; QPSK; UMTS; Universal Mobile Telecommunications System; hardware demonstrator; joint-detection-CDMA; linearity; low cost terminals; multi-code operation; power spectrum; short code design; spectra; spectral artefacts; standardisation process; Costs; GSM; Hardware; Linearity; Multiaccess communication; Multiple access interference; Peak to average power ratio; Quadrature phase shift keying; Testing; Time division multiple access;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686171
