Granted Patent B2

US 8,159,929 · App. 12/046,956 · Granted Apr 17, 2012

Abstract

Claims (85)

1. A method of transmission multiplexing configuration control (TMCC) information acquisition in an integrated service digital broadcasting terrestrial/terrestrial sound broadcast (ISDB-T/TSB) receiver, said method comprising:

computing a phase difference of two adjacent symbols for all TMCC and auxiliary channel (AC) bins over a plurality of symbols;

compensating resulting phase differences;

determining whether a particular phase difference lies between 45° to 135° or between 225° to 315°;

mapping the compensated phase differences to numeric numbers;

summing the mapped compensated phase differences;

repeating the computing through summing steps for a specified number of symbols;

accumulating the summation of said mapped compensated phase differences; and

comparing the accumulated results for each candidate of coarse frequency offset in said receiver.

2. The method of claim 1 , wherein the mapping of said compensated phase differences comprises mapping a compensated phase difference to 1 when said compensated phase difference is between 315° to 45° or between 135° to 225°.

3. The method of claim 1 , wherein the mapping of said compensated phase differences comprises mapping a compensated phase difference to −1 when said compensated phase difference is between 45° to 135° or between 225° to 315°.

4. The method of claim 1 , further comprises:

receiving phase differences of two adjacent symbols;

performing a hard bit decision on two adjacent symbols;

repeating phase difference receiving of two adjacent symbols and performing hard bit decision of received two adjacent symbols for all symbols of one frame;

storing said hard bit decision of adjacent symbols;

finding a start position of a TMCC information;

conducting difference set decoding of decoded TMCC bits;

locking said TMCC information on successful difference set decoding; and

executing the receiving, performing, and repeating steps until said TMCC information is locked or a predetermined maximum number of attempts of locking are reached.

5. The method of claim 1 , further comprises:

receiving phase differences of two adjacent symbols;

performing a soft bit decision on said symbols;

conducting a hard bit decision on said symbols;

storing said hard bit decision of said symbols;

passing said soft decision through a match filter on said symbols;

storing the output of said match filter of said symbols;

executing the receiving through storing of said output of said match filter of said symbol steps for all the symbols of one frame;

comparing match filter outputs and a position of an output with a largest magnitude to find a start position of a TMCC information and a symbol number;

completing difference set decoding on a sliced decision of the received TMCC soft information; and

locking said TMCC information on successful difference set decoding.

6. The method of claim 5 , further comprises:

conducting a second receiving of phase differences of two adjacent symbols;

conducting a second performing of a soft decision on said symbols;

averaging and said soft decision with soft decision obtained 204 symbols previously;

storing said average soft decision;

passing said soft decision through a match filter on said symbols;

flipping the sign of output of said matched filter;

accumulating said flipped output with output obtained 204 symbols previously;

conducting a second comparing of match filter outputs and a position of an output with a largest magnitude to find said start position of said TMCC information and a symbol number;

completing difference set decoding on a sliced decision of the received TMCC soft information;

conducting a second locking of said TMCC information on successful difference set decoding; and

executing the receiving through second conducting of locking of said TMCC information until said TMCC information is locked or a predetermined maximum number of attempts of locking are reached.

7. A method of transmission multiplexing configuration control (TMCC) information acquisition in an integrated service digital broadcasting terrestrial/terrestrial sound broadcast (ISDB-T/TSB) receiver, said method comprising:

computing a phase difference of two adjacent symbols for all TMCC bins over a total number of symbols;

compensating resulting phase differences;

making a decision on a statistically most likely phase difference;

subtracting each compensated phase difference from said statistically most likely phase difference;

determining whether said compensated phase difference is between 0° to 90° and 270° to 360°;

mapping the subtracted phase differences to numeric numbers;

summing the mapped compensated phase differences;

repeating the computing through summing steps for a specified number of symbols;

accumulating the summation of said mapped phase differences; and

comparing the accumulated results for each candidate coarse frequency offset in said receiver.

8. The method of claim 7 , wherein the mapping of said subtracted phase differences comprises mapping a subtracted phase difference to 1 when the corresponding subtracted phase difference is between −90° to 90°.

9. The method of claim 7 , wherein the mapping of said subtracted phase differences comprises mapping a subtracted phase difference to −1 when the corresponding subtracted phase difference is between from 90° to −90°.

10. A non-transitory program storage device readable by computer, tangibly embodying a program of instructions executable by said computer to perform a method of transmission multiplexing configuration control (TMCC) information acquisition in an integrated service digital broadcasting terrestrial/terrestrial sound broadcast (ISDB-T/TSB) receiver, said method comprising:

computing a phase difference of two adjacent symbols for all TMCC and auxiliary channel (AC) bins over a plurality of symbols;

compensating resulting phase differences;

determining whether a particular phase difference lies between 45° to 135° or between 225° to 315°;

mapping the compensated phase differences to numeric numbers;

summing the mapped compensated phase differences;

repeating the computing through summing steps for a specified number of symbols;

accumulating the summation of said mapped compensated phase differences; and

comparing the accumulated results for each candidate of coarse frequency offset in said receiver.

11. The program storage device of claim 10 , further comprises:

receiving phase differences of two adjacent symbols;

performing a hard bit decision on two adjacent symbols;

repeating phase difference receiving of two adjacent symbols and performing hard bit decision of received two adjacent symbols for all symbols of one frame;

storing said hard bit decision of adjacent symbols;

finding a start position of a TMCC information;

conducting difference set decoding of decoded TMCC bits;

locking said TMCC information on successful difference set decoding; and

executing the receiving, performing, and repeating steps until said TMCC information is locked or a predetermined maximum number of attempts of locking are reached.

12. The program storage device of claim 10 , further comprises:

receiving phase differences of two adjacent symbols;

performing a soft bit decision on said symbols;

conducting a hard bit decision on said symbols;

storing said hard bit decision of said symbols;

passing said soft decision through a match filter on said symbols;

storing the output of said match filter of said symbols;

executing the receiving through storing of said output of said match filter of said symbol steps for all the symbols of one frame;

comparing match filter outputs and a position of an output with a largest magnitude to find a start position of a TMCC information and a symbol number;

completing difference set decoding on a sliced decision of the received TMCC soft information; and

locking said TMCC information on successful difference set decoding.

Assignments (23)