Patent ID: 7877064

Claim:
A method for terrestrial broadcast of digital data to stationary receivers, comprising: encoding and modulating digital data by an encoder and modulator, respectively, using coded orthogonal frequency division multiplexing (COFDM) to produce a data stream; and communicating said data stream to a stationary receiver via a terrestrial wireless link having a ratio of (i) 50% coherence bandwidth to (ii) allocated channel bandwidth of not greater than 50%, wherein the 50% coherence bandwidth is defined as a channel frequency coherence function, φ c (Δf) for which a magnitude of the channel frequency coherence function is 0.5, the channel frequency coherence function having a multipath intensity profile with the magnitude described by the equation:  ϕ C ⁡ ( Δ ⁢ ⁢ f )  = 1 1 + ( 2 ⁢ π ⁢ ⁢ Δ ⁢ ⁢ f ⁢ ⁢ τ o ) 2 ; where τ o is a root-mean-square delay spread of the channel.