Patent ID: 8488655

Claim:
A communication device, comprising: a transceiver with a physical (PHY) layer, wherein the PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation, wherein the PHY layer is configured to transmit and receive data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450 MHz, 863-870 MHz, 902-928 MHz, 950-956 MHz, 2360-2400 MHz, and 2400-2483.5 MHz, and wherein modulation accuracy is determined as an error-vector magnitude (EVM) measurement EVM = 1 N ⁢ ∑ k = 1 N ⁢ ( δ ⁢ ⁢ I k 2 + δ ⁢ ⁢ Q k 2 ) S 2 × 100 ⁢ % , computed over N baud-spaced received complex values (Î k , {circumflex over (Q)} k ), where error vector (δI k , δQ k ) is the distance from an ideal position to an actual position of the received complex values and S is the magnitude of the vector to an ideal constellation point, wherein the EVM measurement is measured on baseband I and Q samples after a received signal is passed through a reference receiver that performs the following operations: matched square-root-raised-cosine filter (SRRC) filtering, carrier-frequency offset estimation and symbol timing recovery while making the EVM measurements.