A transceiver (100; 200) for Orthogonal Frequency Division Multiplexing, OFDM, communication, comprising a receiver (150; 250), a transmitter (140, 240), a memory (160; 260) and a controller (170; 270), the receiver (150; 250) is adapted: for receiving a packet from a transmitting transceiver, the packet including a packet header having a receiver station identifier identifying the transceiver as an intended transceiver for receiving the packet and a signal field, the signal field including: Length information in bytes and Rate information, wherein the length and rate information are encoded in an OFDM symbol, the Length and Rate information not permitting an unintended receiver to correctly demodulate data symbols of the packet while, in combination, being useable by the unintended receiver to determine the duration of the packet, and wherein the receiver is characterised in that it is adapted to determine that the packet header further includes an indication of which one of a plurality of optimized communication parameter sets is to be used for decoding the data field of the received packet by the receiver (150; 250), said one of said plurality of optimized communication parameter sets having been determined by the receiver of the intended transceiver and being used in an effort to optimize a data communication rate when communicating to the intended transceiver by implementing a change in data communication rate using said indication of said one optimized communication parameter set, and said one of said plurality of optimized communication parameter sets comprising an indication of at least one of a different number of bits modulated per sub carrier and a different pilot tone allocation, as compared to a previously transmitted number of bits per sub carrier and pilot tone allocation of a previously transmitted optimized communication parameter set, to be used to implement said change in data communication rate; and for using said one of said plurality of optimized communication parameter sets to correctly decode data symbols of the data field of the packet. for receiving a packet from a transmitting transceiver, the packet including a packet header having a receiver station identifier identifying the transceiver as an intended transceiver for receiving the packet and a signal field, the signal field including: Length information in bytes and Rate information, wherein the length and rate information are encoded in an OFDM symbol, the Length and Rate information not permitting an unintended receiver to correctly demodulate data symbols of the packet while, in combination, being useable by the unintended receiver to determine the duration of the packet, and wherein the receiver is characterised in that it is adapted to determine that the packet header further includes an indication of which one of a plurality of optimized communication parameter sets is to be used for decoding the data field of the received packet by the receiver (150; 250), said one of said plurality of optimized communication parameter sets having been determined by the receiver of the intended transceiver and being used in an effort to optimize a data communication rate when communicating to the intended transceiver by implementing a change in data communication rate using said indication of said one optimized communication parameter set, and said one of said plurality of optimized communication parameter sets comprising an indication of at least one of a different number of bits modulated per sub carrier and a different pilot tone allocation, as compared to a previously transmitted number of bits per sub carrier and pilot tone allocation of a previously transmitted optimized communication parameter set, to be used to implement said change in data communication rate; and Length information in bytes and Rate information, wherein the length and rate information are encoded in an OFDM symbol, the Length and Rate information not permitting an unintended receiver to correctly demodulate data symbols of the packet while, in combination, being useable by the unintended receiver to determine the duration of the packet, and wherein the receiver is characterised in that it is adapted to determine that the packet header further includes an indication of which one of a plurality of optimized communication parameter sets is to be used for decoding the data field of the received packet by the receiver (150; 250), said one of said plurality of optimized communication parameter sets having been determined by the receiver of the intended transceiver and being used in an effort to optimize a data communication rate when communicating to the intended transceiver by implementing a change in data communication rate using said indication of said one optimized communication parameter set, and said one of said plurality of optimized communication parameter sets comprising an indication of at least one of a different number of bits modulated per sub carrier and a different pilot tone allocation, as compared to a previously transmitted number of bits per sub carrier and pilot tone allocation of a previously transmitted optimized communication parameter set, to be used to implement said change in data communication rate; and for using said one of said plurality of optimized communication parameter sets to correctly decode data symbols of the data field of the packet.