Details of Grant 

EPSRC Reference:	GR/J11942/01
Title:	INVESTIGATION OF SEQUENCE SEGMENT KEYING (SSK) AND ITS APPLICATION IN CDMA SYSTEMS
Principal Investigator:	Darnell, Professor M
Other Investigators:	Gallagher, Mr M
Researcher Co-Investigators:
Project Partners:
Department:	Electronic Engineering
Organisation:	University of Hull
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 1993	Ends:	31 August 1995	Value (£):	80,732
EPSRC Research Topic Classifications:	RF & Microwave Technology
EPSRC Industrial Sector Classifications:
Related Grants:
Panel History:
Summary on Grant Application Form
(I) To investigate sequence types appropriate for SSK multi-user systems;(ii) To investigate data encoding/decoding techniques for SSK;(iii) To investigate the adaptive operation of SSK systems in response to channel state and user requirements;(iv) To implement a DSP-based, multi-user, SSK communications system.Progress:This is a joint programme with the University of Lancaster; it is intended to transfer that element previously at the University of Hull to the University of Leeds w.e.f. 01.05.95.The first year of the programme has concentrated on a comprehensive analysis and simulation of various SSK design options. The following aspects have been covered:(I) SSK in an FSK environment;(ii) SSK in a PSK environment;(iii) Synthesis of completely uncorrelated sequence sets, suitable as SSK bearer sequences;(iv) Data modulation options;(v) Diversity processing inherent in the SSK technique. At present, the extension of the above analytical activity to a consideration of non-periodic SSK sequence sets is in progress. If successful, this will simplify the initial synchronisation acquisition process considerably. Future activity will concentrate on a real-time DSP implementation of an SSK demonstrator system, with a wide range of parameter variation. The performance of this system over various forms of practical communications channels will be investigated. In particular, the adaptive variation of SSK system parameters to achieve improved performance with time-variable channels will be considered. The final element of the programme will be to coalesce the work at Leeds and Lancaster within the demonstrator system framework. The manner in which SSK encoding and error control coding of various forms can be co-ordinated to allow improved overall performance will be pursued. The performance of SSK and more conventional CDMA will then be evaluated.
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Organisation Website:	http://www.hull.ac.uk