Adaptive modulation and coding method
AssigneeMediatek Inc.
InventorsSung-Kang Yang, Ta-Sung Lee
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Abstract
An adaptive modulation and coding (AMC) method for data transmission by various modulation orders and coding rates is provided. A signal-to-noise ratio (SNR) of a transmission channel is estimated. Quality of service (QOS) parameters are provided, defining maximum allowable delay and packet error rate (PER). A retransmission limit is determined from the maximum allowable delay. An optimum packet length is determined based on the QOS parameters and the SNR. A modulation order and a coding rate most suitable for the estimated SNR and the defined PER are selected based on the optimum packet length and the retransmission limit.
Claims7
An adaptive modulation and coding (AMC) method for data transmission by various modulation orders and coding rates, comprising:
- estimating a signal-to-noise ratio (SNR) of a transmission channel;
- providing quality of service (QOS) parameters defining maximum allowable delay and packet error rate (PER);
- determining a retransmission limit from the maximum allowable delay;
- determining an optimum packet length based on the QOS parameters and the SNR;
- and
- selecting a modulation order from a plurality of predetermined modulation orders and a coding rate from a plurality of predetermined code rates based on the optimum packet length and the retransmission limit, wherein the selected modulation order and the selected coding rate are most suitable for the estimated SNR and the defined PER.
Dependencies are inferred from the claim text.