Based on time shift properties of discrete Fourier transform, the constellation point distribution of orthogonal frequency division multiplexing (OFDM) system in multi-path channel is analyzed.

Some people have speculated that the long hot summers they remember in the 70s might have had something to do with the dog poo turning white.

One of the reasons dog poo was everywhere, it seems, is that dog owners were even worse back then at cleaning up after their pets. Some people have speculated that the long hot summers they remember ...

For many people it was as much a part of the 70s as bell bottoms, platform shoes and disco music. Ask people to cast their minds back 50 years and one thing they’ll almost certainly remember is seeing ...