An Optimal Time-Dependent Receiver for Interference Rejection
Award last edited on: 3/14/2002

Sponsored Program
Awarding Agency
Total Award Amount
Award Phase
Solicitation Topic Code

Principal Investigator
Jeffrey Reed

Company Information

ACM Systems Inc (AKA: ACM Systems Inc~Advanced Counter-Measure Systems )

3034 Gold Canal Drive
Rancho Cordova, CA 95670
   (916) 859-4777
Location: Single
Congr. District: 07
County: Sacramento

Phase I

Contract Number: 9060106
Start Date: 1/1/1991    Completed: 9/30/1991
Phase I year
Phase I Amount
This project examines a new and innovative method of implementing a receiver that has superior performance over that of conventional receivers in rejecting interference. The improved interference rejection allows the transmitter to use less power to achieve the required bit-error rate performance, and hence reduces the probability that the transmitter will interfere with other users of the spectrum. The new receiver, called the optimal time-dependent receiver (OTDR), is developed by considering a receiver as a time-varying filtering process. The OTDR is an adaptive time-varying filter that is optimized to handle changing signal conditions and nonstationary interference. The superior performance of the OTDR is obtained by exploiting the cyclostationary nature of the interference. The OTDR is capable of performing down conversion, equalization, multipath rejection, interference rejection, baud sampling, synchronization, and symbol conversion all within the same operation. The OTDR can be configured to handle a variety of modulation types, all using little or no additional hardware, and thus is capable of numerous and varied modes. The OTDR is implemented using digital signal processing techniques and the hardware can be made small, reliable, and maintenance free. The objective of this project is to determine the theoretical and experimental performance of the OTDR in several realistic commercial situations. The evaluation will include determining the trade-offs in the OTDR system design.The potential commercial application as described by the awardee: The OTDR could provide rejection of interference in commercial satellites and mobile radio communications, thus conserving the spectral resources and providing an increase in channel capacity.

Phase II

Contract Number: ----------
Start Date: 00/00/00    Completed: 00/00/00
Phase II year
Phase II Amount