Transmitting method, receiving method, transmitter, and receiver

• US 6,674,732 B1
• Filed: 01/24/2000
• Issued: 01/06/2004
• Est. Priority Date: 02/13/1998
• Status: Expired due to Term

• Current Assignee: Thomson Licensing (Vantiva SA)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony International GmbH
• Inventors: Amir-Alikhani, Hamid, Suzuki, Mitsuhiro, Stirling-Gallacher, Richard, Izumi, Seiichi, Odaka, Kentaro, Boehnke, Ralf
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): PHAM, BRENDA H
• Application Number:
  US09/402,637
• Time in Patent Office: 1,443 Days
• Field of Search: 370/320, 370/321, 370/322, 370/329, 370/335, 370/337, 370/342, 370/347
• US Class Current: 370/320
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04J 4/00 Combined time-division and frequency-division multiplex systems H04J13/00 takes precedence ; data transmission H04L5/26; telemetry G08C15/00
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601

Abstract

A time slot which is formed by time-division multiplexing is divided into a plurality of blocks in at least a frequency direction, and also within each one of said plurality of blocks a plurality of subcarriers are formed. A predetermined number of plurality of blocks forms one communication channel, whereby a plurality of communications are formed within a time slot. With this, one time slot can be multiplexed by communication of multiple carriers separated in frequency. In this manner, with simple constitution, communication can be performed satisfactorily even in an environment where a multiple path is present.

Claims

1. A transmitting method comprising the steps of:

dividing a time slot formed by time-division multiplexing into a plurality of blocks in at least a frequency direction;

forming a plurality of subcarriers within each one of said plurality of blocks;

forming one communication channel with a predetermined number of said plurality of blocks, thereby forming a plurality of communication channels within said time slot; and

transmitting information of a transmission object with said plurality of subcarriers by using a desired communication channel of said plurality of communication channels, wherein said step of forming one communication channel includes allocating said predetermined number of said plurality of blocks randomly to said one communication channel.

2. A transmitting method comprising the steps of:

dividing a time slot formed by time-division multiplexing into a plurality of blocks in at least a frequency direction;

forming a plurality of subcarriers within each one of said plurality of blocks;

forming one communication channel with a predetermined number of said plurality of blocks, thereby forming a plurality of communication channels within said time slot; and

transmitting information of a transmission object with said plurality of subcarriers by using a desired communication channel of said plurality of communication channels, wherein said step of transmitting includes superposing said information of said transmission object on said plurality of subcarriers of said desired communication channel, by performing a Fourier transformation on said information of said transmission object.

3. A receiving method, wherein

when a time slot formed by time-division multiplexing is divided into a plurality of blocks in at least a frequency direction, then a plurality of subcarriers are formed within each one of said plurality of blocks, then one communication channel is formed with a predetermined number of said plurality of blocks, thereby forming a plurality of communication channels within said time slot, and lastly information of a transmission object is transmitted with said plurality of subcarriers by using a desired communication channel of said plurality of communication channels the receiving method comprising the steps of:

obtaining a reception signal by receiving said time slot which includes said desired communication channel used when said information of said transmission object is transmitted;

fetching all information of said time slot by performing a Fourier transformation on said reception signal; and

fetching said information of said transmission object transmitted using said desired communication channel used in communication with a local station from said all information.

4. The receiving method according to claim 3, wherein said one communication channel is a channel formed by allocating said predetermined number of said plurality of blocks randomly.

5. A transmitter comprising:

transmission means which initially divides a time slot formed by time-division multiplexing into a plurality of blocks in at least a frequency direction, secondly forms a plurality of subcarriers within each one of said plurality of blocks, then thirdly forms one communication channel with a predetermined number of said plurality of blocks, thereby forming a plurality of communication channels within said time slot, and

means for transmitting information of a transmission object with said plurality of subcarriers by using a desired communication channel of said plurality of communication channels, wherein said transmission means includes means for allocating said predetermined number of said plurality of blocks randomly to said one communication channel.

6. A transmitter comprising:

transmission means which initially divides a time slot formed by time-division multiplexing into a plurality of blocks in at least a frequency direction, secondly forms a plurality of subcarriers within each one of said plurality of blocks, then thirdly forms one communication channel with a predetermined number of said plurality of blocks, thereby forming a plurality of communication channels within said time slot, and

means for transmitting information of a transmission object with said plurality of subcarriers by using a desired communication channel of said plurality of communication channels, wherein said transmission means includes means for superposing said information of said transmission object on said plurality of subcarriers of said desired communication channel, by performing a Fourier transformation on said information of said transmission object.

7. A receiver comprising reception means in which, when a time slot formed by time-division multiplexing is divided into a plurality of blocks in at least a frequency direction, then a plurality of subcarriers are formed within each one of said plurality of blocks, then one communication channel is formed with a predetermined number of said plurality of blocks, thereby forming a plurality of communication channels within said time slot, and lastly information of a transmission object transmitted with said plurality of subcarriers by using a desired communication channel of said plurality of communication channels is received,

said reception means obtains a reception signal by receiving said time slot which includes said desired communication channel used when said information of said transmission object is transmitted, then fetches all information of said time slot by performing a Fourier transformation on said reception signal, and fetches said information of said transmission object transmitted using said desired communication channel used in communication with a local station from said all information.

8. The receiver according to claim 7, wherein said one communication channel is a channel formed by allocating said predetermined number of said plurality of blocks randomly.