Phase error free linc modulator

S. Tomisato; K. Chiba; K. Murota

doi:10.1049/el:19890392

Phase error free linc modulator

S. Tomisato, K. Chiba, K. Murota

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

A new technique for linear amplification with nonlinear components (LINC) is described. LINC implementation is thought to be very difficult because of its sensitivity to phase error caused by the difference in electrical length between two power amplifier branches. The allowable limit of phase error for achieving the 60 dB suppression of the adjacent channel interference (ACI) power is estimated for roll-off bandlimited offset QPSK (OQPSK). Then, a compensating method for this phase error is presented. By using the proposed method, sufficient out-of-band spectrum suppression for mobile radio application is obtained. An output power of 7.5 W and a power efficiency of 21% are experimentally confirmed.

Original language	English
Pages (from-to)	576-577
Number of pages	2
Journal	Electronics Letters
Volume	25
Issue number	9
DOIs	https://doi.org/10.1049/el:19890392
Publication status	Published - Jan 1 1989
Externally published	Yes

Keywords

Amplifiers
Errors
Mobile radio systems
Modulation

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1049/el:19890392

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AU - Murota, K.

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N2 - A new technique for linear amplification with nonlinear components (LINC) is described. LINC implementation is thought to be very difficult because of its sensitivity to phase error caused by the difference in electrical length between two power amplifier branches. The allowable limit of phase error for achieving the 60 dB suppression of the adjacent channel interference (ACI) power is estimated for roll-off bandlimited offset QPSK (OQPSK). Then, a compensating method for this phase error is presented. By using the proposed method, sufficient out-of-band spectrum suppression for mobile radio application is obtained. An output power of 7.5 W and a power efficiency of 21% are experimentally confirmed.

AB - A new technique for linear amplification with nonlinear components (LINC) is described. LINC implementation is thought to be very difficult because of its sensitivity to phase error caused by the difference in electrical length between two power amplifier branches. The allowable limit of phase error for achieving the 60 dB suppression of the adjacent channel interference (ACI) power is estimated for roll-off bandlimited offset QPSK (OQPSK). Then, a compensating method for this phase error is presented. By using the proposed method, sufficient out-of-band spectrum suppression for mobile radio application is obtained. An output power of 7.5 W and a power efficiency of 21% are experimentally confirmed.

KW - Amplifiers

KW - Errors

KW - Mobile radio systems

KW - Modulation

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Phase error free linc modulator

Abstract

Keywords

ASJC Scopus subject areas

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