Method and apparatus for transmitting a-priori information in a communication system

• US 9,326,295 B1
• Filed: 12/10/2014
• Issued: 04/26/2016
• Est. Priority Date: 12/10/2014
• Status: Active Grant

• Current Assignee: Saturn Licensing LLC (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Fay, Luke
• Primary Examiner(s): Puente, Eva
• Application Number:
  US14/566,574
• Time in Patent Office: 503 Days
• Field of Search: 375/139, 375/346, 375/260
• US Class Current: 1/1
• CPC Class Codes: H04B 2001/6912 using chirp
• CPC Class Codes: H04L 27/26025 Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking allocating sub-channels of the transmission path H04L5/003
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 27/2666 Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 72/56 based on priority criteria

Abstract

Methods and apparatuses are provided for transmitting and receiving a-priori information. The transmitting method includes generating, by circuitry of a transmission apparatus, the a-priori information based on a sampling frequency and a channel bandwidth of a signal to be transmitted. The a-priori information is appended to a data signal by the circuitry. The circuitry transmits the data signal including the appended a-priori information to a reception apparatus.

Claims

1. A method for transmitting a-priori information, the method comprising:

generating, by circuitry of a transmission apparatus, a chirp signal that represents the a-priori information based on a sampling frequency and a channel bandwidth of a signal to be transmitted, the chirp signal including at least one burst with a chirp rate equal to the sampling frequency and with a maximum frequency equal to the channel bandwidth;

appending, by the circuitry, the chirp signal that represents the a-priori information to a data signal; and

transmitting, by a transmitter, the data signal including the appended chirp signal that represents the a-priori information to a reception apparatus.

2. The method of claim 1, wherein the chirp signal includes at least two identical bursts.

3. The method of claim 1, wherein the chirp signal is appended to a COFDM (coded orthogonal frequency division multiplexing) frame.

4. The method of claim 2, wherein the beginning of one of the at least two identical bursts is detected by a change in frequency between two of the at least two identical bursts.

5. The method of claim 3, wherein the chirp signal is appended to a preamble of the COFDM frame.

6. A method for receiving a-priori information, the method comprising:

receiving, by a receiver of a reception apparatus, a transmitted signal, the transmitted signal including a-priori information appended to a data signal;

detecting, by circuitry of the reception apparatus, a chirp signal that represents the a-priori information included in the transmitted signal, the chirp signal including at least one burst with a chirp rate equal to the sampling frequency and with a maximum frequency equal to the channel bandwidth; and

determining, by the circuitry, a sampling frequency and a channel bandwidth associated with the transmitted signal based on the detected chirp signal that represents the a-priori information.

7. The method of claim 6, further comprising:

adjusting a tuner of the receiver that receives the transmitted signal based on the determined channel bandwidth; and

performing analog to digital conversion of the received signal based on the determined sampling frequency.

8. The method of claim 6, wherein the step of detecting comprises:

performing FM demodulation of the transmitted signal.

9. The method of claim 6, wherein the chirp signal includes at least two identical bursts.

10. The method of claim 6, wherein the chirp signal is appended to a COFDM (coded orthogonal frequency division multiplexing) frame.

11. The method of claim 9, wherein the beginning of one of the at least two identical bursts is detected by a change in frequency between two of the at least two identical bursts.

12. The method of claim 10, wherein the chirp signal is appended to a preamble of the COFDM frame.

13. A transmission apparatus, comprising:

circuitry configured to;

generate a chirp signal that represents a-priori information based on a sampling frequency and a channel bandwidth of a data signal to be transmitted, the chirp signal including at least one burst with a chirp rate equal to the sampling frequency and with a maximum frequency equal to the channel bandwidth; and

append the chirp signal that represents the a-priori information to the data signal; and

a transmitter configured to transmit the data signal including the appended chirp signal that represents the a-priori information to a reception apparatus.

14. A reception apparatus, comprising:

a receiver configured to receive a transmitted signal, the transmitted signal including a-priori information appended to a data signal; and

circuitry configured to;

detect a chirp signal that represents the a-priori information included in the transmitted signal, the chirp signal including at least one burst with a chirp rate equal to the sampling frequency and with a maximum frequency equal to the channel bandwidth; and

determine a sampling frequency and a channel bandwidth associated with the transmitted signal based on the detected chirp signal that represents the a-priori information.