Binary transmitter and method of transmitting data in binary format

• US 7,292,645 B2
• Filed: 05/24/2002
• Issued: 11/06/2007
• Est. Priority Date: 05/29/2001
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Agere Systems Incorporated (Broadcom, Inc.)
• Inventors: Kruys, Jan P.
• Primary Examiner(s): Ha; Dac V.
• Application Number:
  US10/153,380
• Publication Number:
  US 20030016760A1
• Time in Patent Office: 1,992 Days
• Field of Search: 375/141, 375/146, 375/219, 375/220, 375/222, 375/259, 375/269, 375/272, 375/279, 375/295, 375/298, 375/303, 375/308, 341/51, 332/169
• US Class Current: 375/272
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

The present invention provides a binary transmitter. In one embodiment, the binary transmitter includes a data coder that receives and encodes binary data to be transmitted and a modulator that employs the binary data directly to modulate a carrier wave to yield a stream of broadband RF signals. Also, the binary transmitter includes a header generator that interposes header information into the stream and an RF amplifier that amplifies the stream for transmission via an antenna. A method of transmitting data and a wireless data communication system incorporating the transmitter or the method are also disclosed.

Claims

1. A local-area network (LAN) transceiver, comprising:

a data coder configured to receive and encode binary data;

a modulator configured to employ a training sequence to establish optimum transmission parameters of said encoded data and to employ said encoded data to modulate a radio-frequency carrier using binary modulation, said training sequence including a time distortion detection portion configured to determine a maximum tolerable time distortion in a transmission path of said modulated radio-frequency carrier; and

a transmitter that amplifies and transmits said modulated carrier.

2. The LAN receiver recited in claim 1, wherein said binary modulation comprises enabling said carrier for a time period of an integer multiple of a minimum time period.

3. The LAN receiver recited in claim 2, wherein said training sequence includes a gain setting portion.

4. The LAN receiver recited in claim 3, wherein said gain setting period comprises enabling said carrier for a time period that is a power of two times said minimum time period.

5. The LAN receiver recited in claim 2, wherein said transmitter is further configured to employ a rate signaling field, a code selection field, and a start of data field.

6. The LAN receiver recited in claim 5, wherein said rate signaling field comprises an OFF time period comprising a fixed integer power of two times said minimum time period and an ON time period comprising a variable integer power of two times said minimum time period, wherein said variable power of two encodes a signaling rate.

7. The LAN receiver recited in claim 5, wherein said code selection field comprises an OFF time period comprising a fixed integer power of two times said minimum time period and an ON time period comprising a variable integer power of two times said minimum time period, wherein said variable power of two encodes a coding type.

8. The LAN receiver recited in claim 5, wherein said data signaling field comprises an OFF time period comprising a fixed integer power of two times said minimum time period and a sequence of ON-OFF time periods forming a binary value that encodes a length of a data block following said training sequence.

9. The LAN receiver recited in claim 1, wherein said time distortion detection portion comprises a series of ON-OFF time periods, said series subdivided into a plurality of subgroups comprising ON-OFF time periods of equal duration, wherein an equal duration of a previous subgroup is longer than an equal duration of a subsequent subgroup.

10. The LAN receiver recited in claim 9, wherein an equal duration of a previous subgroup is a power of two greater than an equal duration of a subsequent subgroup.

11. A method of transmitting digital data in a local-area network (LAN), comprising:

encoding binary data;

employing said encoded data to modulate a radio-frequency carrier using on-off keying;

employing a training sequence to cooperatively negotiate with a receiver to determine optimum parameters for transmitting said data to said receiver, said training sequence including a time distortion detection portion configured to determine a maximum tolerable time distortion in a transmission path of said modulated radio-frequency carrier; and

p1 transmitting said modulated carrier.

12. The method recited in claim 11, wherein said on-off keying comprises enabling said carrier for a time period of an integer multiple of a minimum time period.

13. The method recited in claim 12, wherein said training sequence includes a gain setting portion.

14. The method recited in claim 13, wherein said gain setting period comprises enabling said carrier for a time period that is a power of two times said minimum time period.

15. The method recited in claim 12, wherein said training sequence includes a rate signaling field, a code selection field, and a start of data field.

16. The method recited in claim 15, wherein said rate signaling field comprises an OFF time period comprising a fixed integer power of two times said minimum time period and an ON time period comprising a variable integer power of two times said minimum time period, wherein said variable power of two encodes a signaling rate.

17. The method recited in claim 15, wherein said code selection field comprises an OFF time period comprising a fixed integer power of two times said minimum time period and an ON time period comprising a variable integer power of two times said minimum time period, wherein said variable power of two encodes a coding type.

18. The method recited in claim 15, wherein said data signaling field comprises an OFF time period comprising a fixed integer power of two times said minimum time period and a sequence of ON-OFF time periods forming a binary value that encodes a length of a data block following said training sequence.

19. The method recited in claim 11, wherein said time distortion detection portion comprises a series of ON-OFF time periods, said series subdivided into a plurality of subgroups comprising ON-OFF time periods of equal duration, wherein an equal duration of a previous subgroup is longer than an equal duration of a subsequent subgroup.

20. The method recited in claim 19, wherein an equal duration of a previous subgroup is a power of two greater than an equal duration of a subsequent subgroup.