TY - JOUR

T1 - In-Band Generation of Synchronous Linear Data Signals

AU - Kalet, Irving

PY - 1973/10

Y1 - 1973/10

N2 - In-band generation of synchronous linear data signals eliminates the need for preliminary generation of a baseband signal and sharp cutoff filtering. However, the ratio of carrier frequency to pulsing rate must, in general, be an integer if the signal is to be produced by successive pulsing of a single fixed filter. As a consequence, a single-sideband signal of bandwidth W and transmission rate 2W must occupy the frequency band [2NW, (2N + 1)W], N an integer, when it is generated from a single fixed filter. A partial-response signal satisfying this condition is described in this paper. A further analysis demonstrates that a finite number of fixed filters can be used to produce a pulse train in any band where the ratio of carrier frequency to pulsing rate is a rational number. Since this relaxed condition allows any transmission band to be approximated to an arbitrary degree of accuracy, frequency translation can be avoided. A single transversal filter with periodically variedtap weights is shown to be a practical realization.

AB - In-band generation of synchronous linear data signals eliminates the need for preliminary generation of a baseband signal and sharp cutoff filtering. However, the ratio of carrier frequency to pulsing rate must, in general, be an integer if the signal is to be produced by successive pulsing of a single fixed filter. As a consequence, a single-sideband signal of bandwidth W and transmission rate 2W must occupy the frequency band [2NW, (2N + 1)W], N an integer, when it is generated from a single fixed filter. A partial-response signal satisfying this condition is described in this paper. A further analysis demonstrates that a finite number of fixed filters can be used to produce a pulse train in any band where the ratio of carrier frequency to pulsing rate is a rational number. Since this relaxed condition allows any transmission band to be approximated to an arbitrary degree of accuracy, frequency translation can be avoided. A single transversal filter with periodically variedtap weights is shown to be a practical realization.

UR - http://www.scopus.com/inward/record.url?scp=0015670843&partnerID=8YFLogxK

U2 - 10.1109/TCOM.1973.1091551

DO - 10.1109/TCOM.1973.1091551

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AN - SCOPUS:0015670843

SN - 0090-6778

VL - 21

SP - 1116

EP - 1122

JO - IEEE Transactions on Communications

JF - IEEE Transactions on Communications

IS - 10

ER -