Radio transmission apparatus and radio reception apparatus

• US 7,062,245 B2
• Filed: 12/20/2000
• Issued: 06/13/2006
• Est. Priority Date: 12/21/1999
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Miyano, Kentaro, Mimura, Masahiro, Koyanagi, Yoshio, Hasegawa, Makoto, Nakagawa, Youichi
• Primary Examiner(s): Urban, Edward F.
• Assistant Examiner(s): Lee, John J.
• Application Number:
  US09/739,817
• Publication Number:
  US 20010004605A1
• Time in Patent Office: 2,001 Days
• Field of Search: 455/562, 455/272, 455/276.1, 455/277.1, 455/561, 455/103, 455/101, 455/25, 455/60, 455/517, 455/67.16, 455/66.1, 455/562.1, 455/279.1, 455/277.2, 343/797, 343/820, 343/821, 343/795
• US Class Current: 455/277.1
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

Corresponding to transmission data 101, phase controller 105 is controlled to shift a phase of modulated signal 103 by 0° or 180°. Planes of polarization of modulated signals to be transmitted from antennas 106 and 107 are made different from each other corresponding to transmission data 101. The electric field strength of a signal received at antenna 108 changes corresponding to the plane of polarization, thereby voltage value 113 output from electric field strength detector 111 varies corresponding to transmission data 101, and using this variation, judged result 115 is obtained. Two results, namely, demodulated data 112 and judged result 115 are input to comparing circuit 116, whereby the reception apparatus is capable of obtaining received data 117 with high quality.

Claims

1. A radio reception apparatus, comprising:

a receiver that receives a first signal transmitted in a predetermined polarization plane and a second signal transmitted in a polarization plane different from the predetermined polarization plane;

an electric field strength detector that detects a received electric field strength of said first signal and said second signal; and

a determiner that, upon processing said first signal and said second signal, performs data determination on an as-is basis with respect to data of a signal of a strong electric field strength, and, that, with respect to data of a signal of a weak electric field strength, inverts said data of said signal of said strong electric field strength to make said determination, said signal of a weak electric field strength being weaker than said signal of a strong electric field strength.

2. The radio reception apparatus of claim 1, wherein said determiner comprises:

a D-flip flop that receives as input, data to be corrected, and as gate input, a delayed judge result; and

an X-NOR gate that receives as input, an output of said D-flip flop and said judged result.