Title :
Noncoherent continuous-phase modulation for DS-CDMA
Author :
Lampe, Lutz H J ; Tzschoppe, Roman ; Huber, Johannes B. ; Schober, Robert
Author_Institution :
Inst. for Information Transmission, Erlangen-Nurnberg Univ., Erlangen, Germany
Abstract :
The combination of continuous phase modulation (CPM) with direct-sequence code-division multiple access (DS-CDMA) for multiuser transmission over the additive white Gaussian noise channel is discussed. Concentrating on the important special case of generalized minimum-shift keying, particularly simple receiver structures are obtained. To emphasize on low complexity, noncoherent reception is proposed and appropriate transmitter and receiver designs are provided. The application of reduced-state noncoherent sequence detection and noncoherent filter adaptation ensures high power efficiency and robustness against channel phase variations. Simulation results confirm that the chosen approach of CPM for DS-CDMA achieves high performance with very moderate complexity.
Keywords :
AWGN channels; code division multiple access; continuous phase modulation; demodulation; least mean squares methods; matched filters; minimum shift keying; radio receivers; radio transmitters; spread spectrum communication; DS-CDMA; MMSE; MUI; additive white Gaussian noise channel; continuous phase modulation; direct-sequence code-division multiple access; intersymbol interference; linear minimum mean square error; matched filtering; minimum-shift keying; multiuser interference; multiuser transmission; noncoherent filter adaptation; noncoherent reception; reduced-state noncoherent sequence detection; AWGN; Additive white noise; Continuous phase modulation; Direct-sequence code-division multiple access; Filters; Multiaccess communication; Phase detection; Phase modulation; Pulse modulation; Transmitters;
Conference_Titel :
Communications, 2003. ICC '03. IEEE International Conference on
Print_ISBN :
0-7803-7802-4
DOI :
10.1109/ICC.2003.1204051
