Wireless Ad-Hoc Networks with Receiver Multipacket Reception: Performance Analysis and Signal Processing
Abstract
The aim of this research is to develop new theory and techniques that significantly improve performance of ad hoc networks by advanced signal processing and medium access control (MAC). In particular, we are interested in signal processing algorithms that are capable of separating signals from multiple users therefore provide multipacket reception (MPR) at the receiver, and MAC protocols that take advantage of the MPR capability of the physical layer. During the reporting period, we investigated signal processing techniques with efficient implementation to strengthen the multiuser physical layer of ad hoc networks. We have extended our previous results to wireless sensor networks for which we considered the problem estimating the number of operating sensors and energy distribution. We also considered the problem of reconstructing random signal field using data samples collected from the sensor field. Blind and semi-blind channel estimation and symbol detection algorithms are developed for long code wide-band CDMA systems including systems with multirate and multicode transmissions. A new identifiability condition is established which suggests that channels unidentifiable in short code CDMA systems are almost surely identifiable when aperiodic spreading codes are used. Applications in large scale sensor networks are also considered.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2005
- Accession Number
- ADA430770
Entities
People
- Lang Tong
Organizations
- Cornell University College of Engineering