Linear Block Coding Comparison (6, 3) vs (7, 4)

def forward_6(input_sig, SNR, mod_mode, rayleigh, chcode_mode):

    error = 0

    if chcode_mode == "LDPC":
        encoded_sig, redund_bit = Tx.LDPC_Encode(input_sig)
    elif chcode_mode == "block":
        block_level = 6
        encoded_sig = Tx.block_encode(input_sig, n=block_level)
    
    modulated_sig, table_for_demod = Tx.Modulation(input_sig=encoded_sig, mode=mod_mode)

    if rayleigh == "Yes" :
        AWGN_input = Fading_Channel.rayleigh(modulated_sig)
    elif rayleigh == "No" :
        AWGN_input = modulated_sig

    AWGN_output = Noise.AWGN(AWGN_input, SNR_dB=SNR)
    demodulated_sig = Rx.DeModulation(AWGN_output, mod_mode, table_for_demod)

    if chcode_mode == "LDPC":
        decoded_sig = Rx.LDPC_Decode(demodulated_sig, redund_bit)
    elif chcode_mode == "block":
        decoded_sig = Rx.Block_Decode(demodulated_sig, n=block_level)

    BER = BER_Check(input_sig, decoded_sig)

    return input_sig, decoded_sig, BER
    
    
    
def forward_7(input_sig, SNR, mod_mode, rayleigh, chcode_mode):

    error = 0

    if chcode_mode == "LDPC":
        encoded_sig, redund_bit = Tx.LDPC_Encode(input_sig)
    elif chcode_mode == "block":
        block_level = 7
        encoded_sig = Tx.block_encode(input_sig, n=block_level)
    
    modulated_sig, table_for_demod = Tx.Modulation(input_sig=encoded_sig, mode=mod_mode)

    if rayleigh == "Yes" :
        AWGN_input = Fading_Channel.rayleigh(modulated_sig)
    elif rayleigh == "No" :
        AWGN_input = modulated_sig

    AWGN_output = Noise.AWGN(AWGN_input, SNR_dB=SNR)
    demodulated_sig = Rx.DeModulation(AWGN_output, mod_mode, table_for_demod)

    if chcode_mode == "LDPC":
        decoded_sig = Rx.LDPC_Decode(demodulated_sig, redund_bit)
    elif chcode_mode == "block":
        decoded_sig = Rx.Block_Decode(demodulated_sig, n=block_level)

    BER = BER_Check(input_sig, decoded_sig)

    return input_sig, decoded_sig, BER
    
    
list_6 = list()
list_7 = list()
input_sig = Bit_Gen(120000)

for i in range(20) :
    input_sig, output_sig, BER = forward_6(input_sig = input_sig, SNR = i, mod_mode = "4-PSK", rayleigh = "No", chcode_mode = "block")
    list_6.append(round(BER, 6))
    input_sig, output_sig, BER = forward_7(input_sig = input_sig, SNR = i, mod_mode = "4-PSK", rayleigh = "No", chcode_mode = "block")
    list_7.append(round(BER, 6))
    print("SNR : {}  Complete!".format(i))

print(list_6)
print(list_7)


SNR_list = list([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19])
plt.plot(SNR_list, list_6, marker='o', linestyle='dashed', color='blue', label='(6, 3)coding')
plt.plot(SNR_list, list_7, marker='x', linestyle='dotted', color='red', label='(7, 4)coding')
plt.axis([0, SNR_list[-1] + 1, 1e-6, 1])
plt.xscale('linear')
plt.yscale('log')
plt.xlabel('EbNo(dB)')
plt.ylabel('BER')

plt.grid(True)
plt.legend()
plt.show()

 

4-PSK

 

8-PSK