Method and testbed system for emulating a communication system with fast changing link condition

A method for emulating a communication system with fast changing link condition, applied to a testbed system that includes an interference emulator, a transmitter, and a receiver, the method comprising:

• generating, by the transmitter, a plurality of code-word symbols according to information bits, wherein the plurality of code-word symbols are ordered in an initial symbol sequence;
• evaluating, by the transmitter, an interference condition and a time duration for each code-word symbol;
• reordering, by the transmitter, the plurality of code-word symbols to a reordered symbol sequence based on interference conditions, and evaluating, by the transmitter, a total time duration of code-word symbols under each interference condition, wherein the code-word symbols with a same interference condition are arranged together in the reordered symbol sequence;
• transmitting, by the transmitter, the plurality of code-word symbols in the reordered symbol sequence;
• obtaining, by the interference emulator, the total time duration of the code-word symbols under each interference condition from the transmitter;
• and
• providing, by the interference emulator, an emulated interference environment by ordering time durations of different interference conditions in a sequence according to the reordered symbol sequence of the plurality of code-word symbols, wherein:
• a start time of transmitting, by the transmitter, the code-word symbols with an interference condition is synchronized with a start time of emulating, by the interference emulator, the interference condition.