Patent ID: 8320438

Claim:
An evaluation device adapted for providing a transceiver system with performance information thereof, the transceiver system including a transmitter and a number K of receivers, and modeling a channel between the transmitter and each of the receivers using Nakagami distribution with a fading parameter, said evaluation device comprising: a signal-to-noise ratio (SNR) setting module operable to set an average SNR for the channel between the transmitter and each of the receivers of the transceiver system; an error rate computing module operable to compute a bit error rate over the channel between the transmitter and each of the receivers, when the fading parameter m is greater than or equal to ½, said error rate computing module being operable to compute the bit error rate P BER based upon P BER = 1 2 ⁢ π ⁢ ∑ n = 0 n ′ ⁢ ⁢ α n · ( m / Q _ ) mK + n ⁢ Γ ⁡ ( mK + n + 0.5 ) ( 1 + mK / Q _ ) mK + n + 0.5 , where Q is the average SNR, α 0 = [ 1 Γ ⁡ ( m + 1 ) ] K , ⁢ α n = 1 n ⁢ ∑ j = 1 n ⁢ ⁢ [ j ⁡ ( K + 1 ) - n ( m + 1 ) j · α n - j ] for a positive integer n, (m+1) j =Γ(m+1+j)/Γ(m+1), Γ ⁡ ( z ) = ∫ 0 ∞ ⁢ t z - 1 ⁢ ⅇ - t ⁢ ⁢ ⅆ t for an arbitrary positive number z, and n′ is an arbitrary positive integer; and an output module operable to provide the transceiver system with the average SNR and the bit error rate as the performance information of the transceiver system.