VSB transmission system

A vestigial sideband (VSB) modulation transmission system, comprising:

• a 1/2 rate convolutional encoder encoding an input signal to generate first and second output signals, the convolutional encoder generating the first output signal by bypassing the input signal and generating a current value of the second output signal based on the input signal and a previous value of the second output signal;
• a 2/3 rate trellis-coded modulation (TCM) encoder encoding the first and second output signals to generate third, fourth, and fifth output signals;
• and
• a signal mapper mapping the third, fourth, and fifth output signals,
• wherein the 1/2 rate convolutional encoder comprises:
• a plurality of multipliers, each ith multiplier multiplying said input signal by a constant ki to generate an ith multiplier value, wherein the constant Ki is greater than 1 for at least one value i;
• a plurality of memories, a first memory storing the previous value of the second output signal as a first memory value and each i+1th memory storing an i+1th memory value obtained by adding an ith memory value stored in an ith memory and said ith multiplier value;
• and
• a plurality of adders, each ith adder adding the ith memory value and the ith multiplier value,
• wherein i=1, 2, 3, . . . , n, and the n+1th memory value stored in the n+1th memory is the current value of the second output signal.