A 30GHz 155Mbit/s self-calibrating direct transmitter

Author

Huang, Xinping ; Zhu, Zhiwen ; Caron, Mario

Author_Institution

Commun. Res. Centre Canada, Ottawa, Ont.

fYear

2006

fDate

21-24 May 2006

Abstract

This paper describes a 155Mbps self-calibrating direct transmitter for Ka-band satellite communications. It uses an 8-PSK modulation to fit the data rate of 155Mbps into a 72MHz channel bandwidth, and employs an adaptive pre-compensation technique to maximize the LO and image suppressions. An FPGA implements the 8-PSK mapper, the pulse-shaping filters and the pre-compensation, while a DSP adaptively estimates the pre-compensation coefficients. A subharmonic vector modulator brings analog inphase and quadrature signals directly from baseband to the 30GHz carrier. Experimental results show that the adaptive pre-compensation technique can effectively suppress the LO leakage and image

Keywords

digital signal processing chips; field programmable gate arrays; phase shift keying; radio transmitters; satellite communication; 155 Mbit/s; 30 GHz; 72 MHz; 8-PSK modulation; DSP; FPGA; Ka-band satellite communications; LO suppression; adaptive pre-compensation technique; analog inphase signal; channel bandwidth; data rate; image suppressions; pulse-shaping filters; quadrature signals; self-calibrating direct transmitter; subharmonic vector modulator; Baseband; Digital signal processing; Field programmable gate arrays; Finite impulse response filter; Frequency conversion; Phase modulation; Power measurement; Signal generators; Transceivers; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on

Conference_Location

Island of Kos

Print_ISBN

0-7803-9389-9

Type

conf

DOI

10.1109/ISCAS.2006.1692848

Filename

1692848