Patent ID: 8605568

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 using M-ary phase shift keying (PSK), differential M-ary PSK or rotated differential M-ary PSK, wherein the PHY layer uses a constant symbol rate for BAN packet transmissions, wherein the PHY layer is configured to prepare a BAN packet for transmission, the BAN packet comprising a physical-layer protocol data unit (PPDU) having a physical-layer convergence protocol (PLCP) preamble, a PLCP header, and a physical-layer service data unit (PSDU), 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, wherein the PLCP preamble comprises an m-sequence and an extension sequence having a timing sequence followed by a DC-balanced sequence, and wherein the DC-balanced sequence comprises a repeated 100 sequence, a repeated 010 sequence, a repeated 001 sequence, a repeated 011 sequence, a repeated 101 sequence, or a repeated 110 sequence, wherein the repeated 100 sequence, the repeated 010 sequence, the repeated 001 sequence, the repeated 011 sequence, the repeated 101 sequence, or the repeated 110 sequence is truncated.