Transmitting/receiving device and transmitting/receiving method

• US 7,072,416 B1
• Filed: 11/08/1999
• Issued: 07/04/2006
• Est. Priority Date: 11/06/1998
• Status: Expired due to Term

• Current Assignee: INVT SPE LLC (SoftBank Group Corp.)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Sudo, Hiroaki, Shirasaki, Yoshimasa
• Primary Examiner(s): Ghayour, Mohammed
• Assistant Examiner(s): ODOM, CURTIS B
• Application Number:
  US09/582,558
• Time in Patent Office: 2,430 Days
• Field of Search: 375/259, 375/262, 375/265, 375/280, 375/316, 370/242, 370/359, 370/537, 332/104, 714/786
• US Class Current: 375/295
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2604 Multiresolution systems by means of multiresolution subcarriers H04L27/183, H04L27/3488

Abstract

In a modulation method such as 8PSK or a 16PSK in which a sender device expresses a symbol by using three or more bits, important information is arranged at least at only one of the first and second bits, a receiver device extracts the important information from at least one of the first and second bits of the received signal, and thereby communication control is carried out based on the important information.

Claims

1. A transmission apparatus comprising:

a converting section to which a first information sequence comprising a plurality of bits in series and a second information sequence comprising a plurality of bits in series are input through different routes and that divides each of the first information sequence and the second information sequence so as to generate a sequence of bits including at least one bit of the first information sequence and at least one bit of the second information sequence, in which the first information sequence is more important than the second information sequence; and

a modulation section that modulates the sequence of bits to provide a transmission signal in such a way that each of the symbols in the transmission signal is expressed using three or more bits on an orthogonal coordinate system including an in-phase component and a quadrature component,

wherein a bit corresponding to the first information sequence is arranged on at least the first bit of each of the symbols, and bits corresponding to the first information sequence are arranged on both the first bit and the second bit of at least one of the symbols.

2. The transmission apparatus according to claim 1, wherein the first information sequence is important according to the level of importance for maintaining a normal communication.

3. The transmission apparatus according to claim 1, wherein information to be arranged on one or both of the first bit and the second bit of each symbol of the transmission signal can be changed at any time according to the level of importance.

4. The transmission apparatus according to claim 1, wherein the first information is separated from all information to be communicated and the second information is other than the first information among all the information to be communicated.

5. The transmission apparatus according to claim 1, further comprising a circuit that performs inverse Fourier transform processing on the modulated first information and second information.

6. A base station apparatus comprising the transmission apparatus of any one of claims 1 to 5, wherein the base station apparatus transmits the transmission signal via an antenna.

7. A communication terminal apparatus comprising the transmission apparatus of any one of claims 1–

5, wherein the communication terminal apparatus transmits the transmission signal via an antenna.

8. A transmission method comprising the steps of:

inputting a first information sequence comprising a plurality of bits in series and a second information sequence comprising a plurality of bits in series through different routes,

dividing each of the first information sequence and the second information sequence so as to generate a sequence of bits including at least one bit of the first information sequence and at least one bit of the second information sequence, in which the first information sequence is more important than the second information sequence; and

modulating the sequence of bits to provide a transmission signal in such a way that each of the symbols is expressed using three or more bits on an orthogonal coordinate system including an in-phase component and a quadrature component,

wherein a bit corresponding to the first information sequence is arranged on at least the first bit of each of the symbols, and bits corresponding to the first information sequence are arranged on both the first bit and the second bit of at least one of the symbols.

9. The transmission method according to claim 8, wherein the first information sequence is important according to the level of importance for maintaining a normal communication.

10. The transmission apparatus according to claim 8, wherein information to be arranged on one or both of the first bit and the second bit of each symbol of the transmission signal can be changed at any time according to the level of importance.