#### Kurosaki2010

##### Newbie level 2

I hope you would be able to help me out. I have written a turbo code encoder and decoder in MATLAB with the specs below:

Channel Additive White Gaussian Noise (AWGN)

Modulation Binary Phase Shift Keying (BPSK)

Component

Encoders -

Two identical recursive

convolutional codes

RSC

Parameters

n = 2, k = 1,K = 3

G0 = 7, G1 = 5

Interleaver

1000-bit random interleaver

Puncturing

Used

Half parity bits from each component

encoder transmitted give half-rate code

Component

Decoders

Log-MAP

decoder

Iterations 8

I expected for 8 iterations, that the BER would be very small for high snr, but to my surprise, This is not so. the BER is still high in comparison to other journals results. The alg is correct to my knowledge. Thanks in advance for your help.