An early code used in radio transmission involved using codewords that consist of binary bits and contain the same number of 1s. Thus, the 2-out-of-5 code only transmits blocks of 5 bits in which 2 bits are 1 and the others 0.
a. List the valid codewords.
b. Suppose that the code is used to transmit blocks of binary bits. How many bits can be transmitted per codeword?
c. What pattern does the receiver check to detect errors?
d. What is the minimum number of bit errors that cause a detection failure?