Correspondence Linear frequency coded sequences (l.f.c.s.) In the early 1970s, I was employed at Loughborough University where, among other things, I was involved in research on phase coded pulse train signals, suitable for pulse compression systems. Part of this work was done with the help of Mr. C.N. Oligboh, who was employed at Loughborough University as a Research Assistant, working under my supervision. I was sorry to see that the August 1980 issue contained a paper A , under the above title, on the work done at Loughborough, which Mr. Oligboh had prepared and sub- mitted under his name and mine, entirely without my knowledge and consent. Had I been asked, I would have been pleased to participate in the preparation of a paper. As it is, the published paper contains a number of errors. Even the affiliation is wrong; I left Loughborough Uni- versity in 1973 and Mr. Oligboh left there soon after. 9th October 1980 MARTIN H. ACKROYD Department of Electrical & Electronic Engineering University of Aston Gosta Green Birmingham England Reference A OLIGBOH, C.N., and ACKROYD, M.H.: 'Linear frequency coded sequences (l.f.c.s.)', IEE Proc. G, Electron. Circuits & Syst., 1980, 127, (4), pp. 191-198 DTC97G Erratum MENGALI, U., and PIRANI, G.: 'Timing-jitter growth in a chain of regenerative repeaters for optical-fibre trans- missions', IEE Proc. G, Electron. Grcuits & Syst., 1980, 127, (3), pp. 153-162: Reference to the authors should read Prof. U. Mengali, Mem. I.E.E.E. and G. Pirani, Mem. I.E.E.E. Section 1, paragraph 5, line 18; unuseful should read useless Section 2, paragraph 1, line 5 ; / should read I Section 2c, line 3; in (a) should read in eqn. 1 Section 3, paragraph 1, line 4; simple should read sample In eqn. 17, the square brackets should be replaced by vertical lines to indicate the modulus of the enclosed expression In the equation between eqns. 24 and 25, cos/x should be deleted from the numerator Section 11.2, heading; 29 should read 45 Section 11.3, heading, Worked example should read Equations 47 and 48 In the caption to Fig. 7, vacancies should read variances ETC73G IEE PROC, Vol. 127, No. 6, Pt. G, DECEMBER 1980 331 0143-7089/801060331+01 $1-50/0

Linear frequency coded sequences (L.F.C.S.)

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Page 1: Linear frequency coded sequences (L.F.C.S.)

CorrespondenceLinear frequency coded sequences (l.f.c.s.)

In the early 1970s, I was employed at LoughboroughUniversity where, among other things, I was involved inresearch on phase coded pulse train signals, suitablefor pulse compression systems. Part of this work wasdone with the help of Mr. C.N. Oligboh, who was employedat Loughborough University as a Research Assistant,working under my supervision.

I was sorry to see that the August 1980 issue containeda paperA, under the above title, on the work done atLoughborough, which Mr. Oligboh had prepared and sub-mitted under his name and mine, entirely without myknowledge and consent. Had I been asked, I would havebeen pleased to participate in the preparation of a paper.As it is, the published paper contains a number of errors.Even the affiliation is wrong; I left Loughborough Uni-versity in 1973 and Mr. Oligboh left there soon after.

9th October 1980 MARTIN H. ACKROYD

Department of Electrical & Electronic EngineeringUniversity of AstonGosta GreenBirminghamEngland

Reference

A OLIGBOH, C.N., and ACKROYD, M.H.: 'Linear frequencycoded sequences (l.f.c.s.)', IEE Proc. G, Electron. Circuits &Syst., 1980, 127, (4), pp. 191-198

DTC97G

ErratumMENGALI, U., and PIRANI, G.: 'Timing-jitter growth in achain of regenerative repeaters for optical-fibre trans-missions', IEE Proc. G, Electron. Grcuits & Syst., 1980,127, (3), pp. 153-162:

Reference to the authors should read Prof. U. Mengali,Mem. I.E.E.E. and G. Pirani, Mem. I.E.E.E.

Section 1, paragraph 5, line 18; unuseful should readuselessSection 2, paragraph 1, line 5 ; / should read ISection 2c, line 3; in (a) should read in eqn. 1

Section 3, paragraph 1, line 4; simple should read sample

In eqn. 17, the square brackets should be replaced byvertical lines to indicate the modulus of the enclosedexpression

In the equation between eqns. 24 and 25, cos/x should bedeleted from the numerator

Section 11.2, heading; 29 should read 45

Section 11.3, heading, Worked example should readEquations 47 and 48

In the caption to Fig. 7, vacancies should read variances

ETC73G

IEE PROC, Vol. 127, No. 6, Pt. G, DECEMBER 1980 331

0143-7089/801060331+01 $1-50/0