Post by yinchyo on Aug 17, 2010 11:25:19 GMT -5
Dear friends,
How much performance improvement can we get by using a
5 register Gold codes versus a 10 register Gold code ?
Obviously we can more number of gold sequences (2^10 -1) by using 10 registers,
but apart from that how much would the size of registers used in gold codes help in reducing interference ( for example in LTE where the data are scrambled (XOR) with gold sequence generated by using 31 registers).
In simulink, I generated two gold sequences and XOR them each with two sets of random data ( Tx and Interferer ) . I then added the two scrambled data and tried to descrambled(XOR) it with gold sequence used for Tx to see if I could recover the original data.
I did this with a 5-register Gold code and 10-register gold code,
the BER values for both the models were around 25%. There didn't seem to be any improvement in recovering the original data.
I am not sure how gold codes help in reducing interference from other Base Stations for example in LTE 3GPP systems.
Can someone please kindly take the time explain this?
thank you
yin
How much performance improvement can we get by using a
5 register Gold codes versus a 10 register Gold code ?
Obviously we can more number of gold sequences (2^10 -1) by using 10 registers,
but apart from that how much would the size of registers used in gold codes help in reducing interference ( for example in LTE where the data are scrambled (XOR) with gold sequence generated by using 31 registers).
In simulink, I generated two gold sequences and XOR them each with two sets of random data ( Tx and Interferer ) . I then added the two scrambled data and tried to descrambled(XOR) it with gold sequence used for Tx to see if I could recover the original data.
I did this with a 5-register Gold code and 10-register gold code,
the BER values for both the models were around 25%. There didn't seem to be any improvement in recovering the original data.
I am not sure how gold codes help in reducing interference from other Base Stations for example in LTE 3GPP systems.
Can someone please kindly take the time explain this?
thank you
yin
