# Multimedia Signal Processing Laboratory

## P. Kabal

## Paper Abstracts 1975

### Papers

P. Kabal and S. Pasupathy

"Partial-Response
Signaling", *IEEE Trans. Commun.*, vol. 23, no. 9, pp. 921-934,
Sept. 1975.

This paper presents a unified study of partial-response
signaling (PRS) systems and extends previous work on the comparison of PRS
schemes. A PRS system model is introduced which enables the investigation of PRS
schemes from the viewpoint of spectral properties such as bandwidth, nulls, and
continuity of derivatives. Several desirable properties of PRS systems and their
relation to system functions are indicated and a number of useful schemes, some
of them not previously analyzed, are presented. These systems are then compared
using as figures of merit speed tolerance, minimum eye width, and
signal-to-noise ratio (SNR) degradation over ideal binary transmission. A new
definition of speed tolerance, which takes into account multilevel outputs and
the effect of sampling time, is introduced and used in the calculation of
speed tolerance figures. It is shown that eye width, a performance measure that
has not been used previously in comparing PRS systems, can be calculated
analytically in many cases. Exact values as well as bounds on the SNR
degradation for the systems under consideration are presented. The effect of
precoding on system performance is also analyzed.

Paper titles.