Editing EDGE (telecommunication) (section)

=== Transmission techniques ===
In addition to [[Gaussian minimum-shift keying]] (GMSK), EDGE uses [[phase-shift keying#Higher-order PSK|higher-order PSK/8 phase-shift keying]] (8PSK) for the upper five of its nine modulation and coding schemes. EDGE produces a 3-bit word for every change in carrier phase. This effectively triples the gross data rate offered by GSM. EDGE, like [[GPRS]], uses a rate adaptation algorithm that adapts the modulation and coding scheme (MCS) according to the quality of the radio channel, and thus the bit rate and robustness of data transmission. It introduces a new technology not found in GPRS, [[Hybrid ARQ|incremental redundancy]], which, instead of retransmitting disturbed packets, sends more redundancy information to be combined in the receiver. This increases the probability of correct decoding.

EDGE can carry a bandwidth up to 236&nbsp;kbit/s (with end-to-end latency of less than 150&nbsp;ms) for 4 [[timeslot]]s (theoretical maximum is 473.6&nbsp;kbit/s for 8 timeslots) in packet mode. This means it can handle four times as much traffic as standard GPRS. EDGE meets the [[International Telecommunication Union]]'s requirement for a [[3G]] network, and has been accepted by the ITU as part of the [[IMT-2000]] family of 3G standards.<ref name="ref1"/> It also enhances the circuit data mode called [[HSCSD]], increasing the data rate of this service.