Repetition coding for a wireless system
A system and method are disclosed for transmitting data over a wireless channel. In some embodiments, transmitting data includes receiving convolutionally encoded data and enhancing the transmission of the data by further repetition encoding the data.
1. A method for transmitting data in a wireless communication system, comprising:
encoding data using a modulation and coding scheme;
repeating the encoded data using a repetition pattern to generate repetition-encoded data, wherein the repetition pattern is based at least in part on a data rate;
interleaving the repetition-encoded data according to a rule, the rule comprising a first rule and a second rule, wherein the first rule specifies that adjacent bits of the repetition-encoded data are separated by a first number of subchannels and the second rule specifies that consecutive coded bits of the repetition-encoded data are separated by a second number of subchannels, and wherein the first and the second numbers of subchannels are finite positive integers and the first number of subchannels is different from the second number of subchannels; and
transmitting the interleaved data over a channel.
2. The method of claim 1 , wherein repeating the encoded data using the repetition pattern comprises duplicating the encoded data and wherein transmitting the interleaved data over the channel comprises transmitting the duplicated data over a number of subchannels of the channel.
3. The method of claim 1 , wherein the modulation and coding scheme comprises binary phase shift keying (BPSK) modulation and a code rate of 1/2.
4. The method of claim 1 , wherein the data is encoded using a modulation scheme from the group consisting of quadrature phase shift keying (QPSK), 16-quadrature amplitude modulation (16-QAM), and 32-quadrature amplitude modulation (32-QAM).
5. The method of claim 1 , wherein the data comprises an orthogonal frequency division multiplexing (OFDM) symbol including a predetermined number of bits, wherein each bit is mapped to and transmitted on a different subchannel of the channel.
6. The method of claim 1 , wherein the data is repeated in one of a frequency domain and a time domain.
7. The method of claim 1 , further comprising:
inserting a number of pilot signals in the data transmitted over the channel.
8. The method of claim 1 , further comprising:
converting the data into a time domain using an inverse fast Fourier transform.
9. An apparatus for transmitting data in a wireless communication system, comprising:
an encoder to encode data using a modulation and coding scheme;
a repetition encoder to repeat the encoded data using a repetition pattern to generate repetition-encoded data, wherein the repetition pattern is based at least in part on a data rate;
an interleaver to interleave the repetition-encoded data according to a rule, the rule comprising a first rule and a second rule, wherein the first rule specifies that adjacent bits of the repetition-encoded data are separated by a first number of subchannels and the second rule specifies that consecutive coded bits of the repetition-encoded data are separated by a second number of subchannels, and wherein the first and the second numbers of subchannels are finite positive integers and the first number of subchannels is different from the second number of subchannels; and
a transmitter to transmit the interleaved data over a channel.
10. The apparatus of claim 9 , wherein repeating the encoded data using the repetition pattern comprises duplicating the encoded data and wherein transmitting the interleaved data over the channel comprises transmitting the duplicated data over a number of subchannels of the channel.
11. The apparatus of claim 9 , wherein the modulation and coding scheme comprises binary phase shift keying (BPSK) modulation and a code rate of 1/2.
12. The apparatus of claim 9 , wherein the data is encoded using a modulation scheme from the group consisting of quadrature phase shift keying (QPSK), 16-quadrature amplitude modulation (16-QAM), and 32-quadrature amplitude modulation (32-QAM).
13. The apparatus of claim 9 , wherein the data comprises an orthogonal frequency division multiplexing (OFDM) symbol including a predetermined number of bits, wherein each bit is mapped to and transmitted on a different subchannel of the channel.
14. The apparatus of claim 9 , wherein the data is repeated in one of a frequency domain and a time domain.
15. The apparatus of claim 9 , further comprising:
a processor to convert the data into a time domain using an inverse fast Fourier transform.
16. A non-transitory computer-readable medium storing instructions executable by a processor to cause a device including the non-transitory computer-readable medium and the processor to:
encode data using a modulation and coding scheme;
repeat the encoded data using a repetition pattern to generate repetition-encoded data, wherein the repetition pattern is based at least in part on a data rate;
interleave the repetition-encoded data according to a rule, the rule comprising a first rule and a second rule, wherein the first rule specifies that adjacent bits of the repetition-encoded data are separated by a first number of subchannels and the second rule specifies that consecutive coded bits of the repetition-encoded data are separated by a second number of subchannels, and wherein the first and the second numbers of subchannels are finite positive integers and the first number of subchannels is different from the second number of subchannels; and
transmit the interleaved data over a channel.
17. The non-transitory computer-readable medium of claim 16 , wherein repeating the encoded data using the repetition pattern comprises duplicating the encoded data and wherein transmitting the interleaved data over the channel comprises transmitting the duplicated data over a number of subchannels of the channel.
18. The non-transitory computer-readable medium of claim 16 , wherein the modulation and coding scheme comprises binary phase shift keying (BPSK) modulation and a code rate of 1/2.
19. The non-transitory computer-readable medium of claim 16 , wherein the data comprises an orthogonal frequency division multiplexing modulation (OFDM) symbol including a predetermined number of bits, wherein each bit is mapped to and transmitted on a different subchannel of the channel.
20. The non-transitory computer-readable medium of claim 16 , wherein the data is repeated in one of a frequency domain and a time domain.