Interleaver address generation in turbo decoders for mobile multimedia multicast system communication systems
View Patent ↗Address generation for interleaving in a wireless communication system includes at least one input generation module to generate at least one input signal. A first address generator module and a second address generator module generate a first output address for interleaving and a second output address for interleaving. A selector module selects an address for interleaving from the first and the second output address based on predetermined criteria. At least one input translation module is receives an input signal and translate the received input signal to generate a nominal input signal based on a value of the received input signal. An address generation module generates an address for interleaving based on the nominal input signal.
1. A system for generating an address for interleaving in a wireless communication system, said system comprising:
at least one input translation module that receives an input signal and translates the received input signal to generate a nominal input signal based on a value of the received input signal; and
an address generation module operatively coupled to said at least one input translation module, wherein said address generation module receives said nominal input signal and generates an address for interleaving based on said nominal input signal,
wherein said address for interleaving is equal to or less than a predetermined value, said predetermined value dependent on a number of bits in said input signal,
wherein translating said received input signal into said nominal input signal comprises:
estimating a value of said nominal input signal as 159 when said value of said received input signal is 155;
estimating said value of said nominal input signal as 1023 when said value of said received input signal is 993; and
estimating said value of said nominal input signal for all remaining values of said received input signal by utilizing: I n =I r +floor(I r /32), wherein I n is said value of said nominal input signal, I r is said value of said received input signal and floor(x) is a standard mathematical function, which returns a highest integer less than or equal to x.
2. The system of claim 1 , wherein said input signal and said nominal input signal is of ten bits.
3. The system of claim 1 , wherein said predetermined value of said address for interleaving is 993.
4. The system of claim 1 , wherein a value of said received input signal is between 0 and 993.
5. The system of claim 1 , wherein said wireless communication system comprises a MediaFLO™ mobile multimedia multicast system.
6. The system of claim 1 , wherein said estimating said value of said nominal input signal for said all remaining values of said received input signal further comprises incrementing the estimated value of said nominal input signal by one upon determining a first condition as true, wherein said first condition being based on: floor(I r /32)>31−(I r mod 32), wherein I r is said value of said received input signal and floor(x) is a standard mathematical function, which returns a highest integer less than or equal to x.
7. The system of claim 1 , wherein said nominal input signal comprises 5 most significant bits.
8. The system of claim 1 , wherein said nominal input signal comprises 5 least significant bits.
9. A method for generating an address for interleaving in a wireless communication system, said method comprising:
receiving an input signal for generating an address for interleaving;
translating the received input signal into a nominal input signal, wherein said received input signal is translated into nominal input signal based upon a value of said received input signal; and
processing said nominal input signal for generating said address for interleaving,
wherein translating said received input signal into said nominal input signal comprises:
estimating a value of said nominal input signal as 159 when said value of said received input signal is 155;
estimating said value of said nominal input signal as 1023 when said value of said received input signal is 993; and
estimating said value of said nominal input signal for all remaining values of said received input signal by utilizing: I n =I r +floor(I r /32), wherein I n is said value of said nominal input signal, I r , is said value of said received input signal and floor(x) is a standard mathematical function, which returns a highest integer less than or equal to x.
10. The method of claim 9 , wherein said received input signal is of 10 bits and a value of said received input signal is between 0 and 993.
11. The method of claim 9 , wherein said estimating said value of said nominal input signal for said all remaining values of said received input signal further comprises incrementing the estimated value of said nominal input signal by one upon determining a first condition as true, wherein said first condition being based on: floor(I r /32)>31−(I r mod 32), wherein I r is said value of said received input signal and floor(x) is a standard mathematical function, which returns a highest integer less than or equal to x.
12. The method of claim 9 , wherein said wireless communication system comprises a MediaFLO™ mobile multimedia multicast system.
13. The method of claim 9 , wherein said nominal input signal comprises 5 most significant bits.
14. The method of claim 9 , wherein said nominal input signal comprises 5 least significant bits.
15. A non-transitory program storage device readable by computer and comprising a program of instructions executable by said computer to perform a method for generating an address for interleaving in a wireless communication system, said method comprising:
receiving an input signal for generating an address for interleaving;
translating the received input signal into a nominal input signal, wherein said received input signal is translated into nominal input signal based upon a value of said received input signal; and
processing said nominal input signal for generating said address for interleaving,
wherein translating said received input signal into said nominal input signal comprises:
estimating a value of said nominal input signal as 159 when said value of said received input signal is 155;
estimating said value of said nominal input signal as 1023 when said value of said received input signal is 993; and
estimating said value of said nominal input signal for all remaining values of said received input signal by utilizing: I n =I r +floor(I r /32), wherein I r is said value of said nominal input signal, I r is said value of said received input signal and floor(x) is a standard mathematical function, which returns a highest integer less than or equal to x.
16. The program storage device of claim 15 , wherein said received input signal is of 10 bits and a value of said received input signal is between 0 and 993.
17. The program storage device of claim 15 , wherein said estimating said value of said nominal input signal for said all remaining values of said received input signal further comprises incrementing the estimated value of said nominal input signal by one upon determining a first condition as true, wherein said first condition being based on: floor(I r /32)>31−(I r mod 32), wherein I r is said value of said received input signal and floor(x) is a standard mathematical function, which returns a highest integer less than or equal to x.
18. The program storage device of claim 15 , wherein said wireless communication system comprises a MediaFLO™ mobile multimedia multicast system.
19. The program storage device of claim 15 , wherein said nominal input signal comprises 5 most significant bits.
20. The program storage device of claim 15 , wherein said nominal input signal comprises 5 least significant bits.