Dec 26, 2005 #1 M mehtesham Junior Member level 3 Joined Nov 14, 2005 Messages 31 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,286 Activity points 1,551 symbol error and bit error hi can you determine how symbol and bir error rates are related.and what this relation depends on.
symbol error and bit error hi can you determine how symbol and bir error rates are related.and what this relation depends on.
Dec 28, 2005 #2 M mnosrati Junior Member level 1 Joined Nov 19, 2005 Messages 17 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,283 Activity points 1,407 hi P_M : symbol error prob. P_b : bit error prob. k : number of bit per each symbol P_M= [2^(k-1)/(2^k-1)]*P_b you must read this book " digital communication" by proakis(chapter five)
hi P_M : symbol error prob. P_b : bit error prob. k : number of bit per each symbol P_M= [2^(k-1)/(2^k-1)]*P_b you must read this book " digital communication" by proakis(chapter five)
Jan 2, 2006 #3 A Aasem_sadek Junior Member level 3 Joined Jan 2, 2006 Messages 26 Helped 2 Reputation 4 Reaction score 1 Trophy points 1,283 Location Egypt,Cairo Activity points 1,501 [size=18]if you are using grey code in coding therefore ser= symbol error rate ber= bit error rate k=number of bits per sybol = log (base 2) M where M is the M ary you are using therefore ber=ser/k[/size]
[size=18]if you are using grey code in coding therefore ser= symbol error rate ber= bit error rate k=number of bits per sybol = log (base 2) M where M is the M ary you are using therefore ber=ser/k[/size]
Jan 4, 2006 #4 C changfa Advanced Member level 4 Joined Dec 14, 2005 Messages 119 Helped 21 Reputation 42 Reaction score 6 Trophy points 1,298 Activity points 2,124 If gray coding is assumed, the bit error rate is 1/log2(M) of symbol rate where M is the modulation order (for example, M=4 for 4PSK). However, gray coding is not always applicable to all modulation constellation. In such case, some approxiamate can be found in Proakis's book.
If gray coding is assumed, the bit error rate is 1/log2(M) of symbol rate where M is the modulation order (for example, M=4 for 4PSK). However, gray coding is not always applicable to all modulation constellation. In such case, some approxiamate can be found in Proakis's book.