Comparison Between Several Methods of PPM Demodulation Based on Iterative Techniques
In this paper we examine demodulation methods for nonuniform Pulse Position Modulation (PPM), which is generated by the crossings of a modulating signal with a sawtooth wave. Here, we are interested in PPM at the Nyquist rate and illustrate the efficiency of the iterative methods. Several iterative methods such as Wiley/Marvasti, Time-varying, adaptive weight, Zero-order-hold, Voronoi, linear interpolation algorithms are discussed, where the PPM demodulation is converted as a nonuniform sampling reconstruction problem. Also another approach called the inverse system approach is introduced and the performance of the two algorithms is assessed.
KeywordsMean Square Error Iterative Method Pulse Position Modulation Impulse Radio Nyquist Rate
Unable to display preview. Download preview PDF.
- 3.Azmi, P., Marvasti, F.: Comparison between Several Iterative Methods of Recovering Signals from Nonuniformly Spaced Samples. In: Proc. IEEE Conference on Sampling Theory and Applications SampTA 2001, Florida-U.S.A, May 13-17, pp. 49–54 (2001)Google Scholar
- 5.Zhao, L., Haimovich, A.: Multi-User Capacity of M-ary PPM Ultra-Wideband Communications. In: Proc. IEEE Conference on Ultrawideband Systems and Communications (UWBST) 2002, Baltimore, Maryland, May 2002, pp. 175–179 (2002)Google Scholar
- 6.Wilson, B., Ghassemlooy, Z.: Pulse Time Modulation Techniques for Optical Communications: A Review. IEE Proceeding-J. 140(6), 346–357 (1993)Google Scholar
- 7.Pierce, J.R., Posner, E.C.: Introduction to Communication Science and System. Plenum (1976)Google Scholar