Frequency and Time Hopping PPM UWB Multiple Access Communication Scheme

Frequency and Time Hopping PPM UWB Multiple Access Communication Scheme

In this paper we propose frequency and time hopping pulse position modulation (FTH-PPM) ultra wideband (UWB) for multiple access communications. We have derived and investigated the bit error probability for the multi-user synchronous transmitter case in multipath channels with Additive White Gaussian Noise (AWGN). Simulation results show that bit error probability performance of FTH-PPM UWB ou...

Performance and Capacity of PAM and PPM UWB Time-Hopping Multiple Access Communications with Receive Diversity

The error probability and capacity of a time-hopping ultra-wideband (UWB) communication system with receive diversity are investigated.We consider pulse amplitudemodulation (PAM) and pulse-positionmodulation (PPM) over additive white Gaussian channels for a single-user system. A multiuser environment with PPM is also investigated. It is shown that the communication distance and error performanc...

Capacity of Time-Hopping PPM and PAM UWB Multiple Access Communications over Indoor Fading Channels

The capacity of time-hopping pulse position modulation (PPM) and pulse amplitude modulation (PAM) for an ultra-wideband (UWB) communication system is investigated based on the multipath fading statistics of UWB indoor wireless channels. A frequency-selective fading channel is considered for both single-user and multiple-user UWB wireless systems. A Gaussian approximation based on the single-use...

Multiple access for UWB impulse radio with pseudochaotic time hopping

Pseudochaotic time hopping (PCTH) is a recently proposed encoding/modulation scheme for ultra-wideband (UWB) impulse radio. PCTH exploits concepts from symbolic dynamics to generate aperiodic spreading sequences, resulting in a noise-like spectrum. In this paper, we present a multiple-access technique suitable for the PCTH scheme. In particular, we provide an analytical expression of the bit-er...

Space-Time FSK for Slow Frequency-Hopping Multiple Access