Title:
ディジタル無線受信機
Document Type and Number:
Japanese Patent JP3549963
Kind Code:
B2
Abstract:
An inexpensive, compact digital radio receiver corrects IQ imbalance, non-orthogonal I and Q phases, and DC offset by a DSP. The digital radio receiver is equipped with an antenna, an RF/IF converter for converting a radio frequency into an intermediate frequency, an IQ separator for separating I and Q, a filter for eliminating a noise such as a radio frequency, a multiplying sampler for sampling the output of the filter, and a digital signal processing unit mainly comprised of the DSP which implements an algorithm for estimating and correcting an IQ distortion and also performs quadrature phase demodulation. The IQ distortion can be removed inexpensively by making use of a part of a standard radio operation, hardly requiring the use of hardware for adjustment.
Inventors:
Hiroshi Nakada
Application Number:
JP28574295A
Publication Date:
August 04, 2004
Filing Date:
November 02, 1995
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H03D3/00; H04B14/00; H04L27/22; H04L25/06; (IPC1-7): H04B14/00; H04L27/22
Domestic Patent References:
| JP2005664A | ||||
| JP7327059A | ||||
| JP5122263A | ||||
| JP690261A |
Foreign References:
| US5321726 |
Attorney, Agent or Firm:
Michiteru Soga
Yoshio Kobayashi
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Masahisa Hase
Tetsuo Kuroiwa
Yoshio Kobayashi
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Masahisa Hase
Tetsuo Kuroiwa