arameters: - the modulation of the sub-carriers, phase modulation (BPSK or QPSK) or mixed phase and amplitude modulation (16-QAM or 64-QAM); Wi-Fi Integration to the 4G Mobile Network - the coding rate of the error correction code, which can take values of 1/2, 2/3, 3/4 or 5/6; - the number of spatial flows of the MIMO mechanism, which can take values of 1, 2, 3 or 4; - the bandwidth of the radio channel, which may be 20 or 40 MHz; - the duration of the guard interval, short duration of 400 ns or long duration of 800 ns. Table 4.7 (respectively Table 4.8) provides the rate values, for a single spatial stream, for the first eight MCS values (between 0 and 7), for a bandwidth of 20 MHz (respectively 40 MHz). Number of Number of DATA bits Number of (Mbps) Coding bits per Modulation encoded DATA bits carrier symbol 800 ns 400 ns 16-QAM 16-QAM 64-QAM 64 QAM 64-QAM Table 4.7. Parameters of the modulation and coding scheme 20 MHz bandwidth 802.11n Interface Number of Number of DATA bits Number of (Mbps) Coding bits per Modulation encoded DATA bits carrier symbol 800 ns 400 ns 16-QAM 16-QAM 64-QAM 108.0 120.0 64 QAM 121.5 135.0 64-QAM 135.0 150.0 Table 4.8. Parameters of the modulation and coding scheme 40 MHz bandwidth The MCS values between 8 and 15 are relative to two spatial streams, for a bandwidth of 20 or 40 MHz. The MCS values between 16 and 23 are relative to three spatial streams, for a bandwidth of 20 or 40 MHz. The MCS values between 24 and 31 are relative to four spatial streams, for a bandwidth of 20 or 40 MHz. The MCS values between 33 and 76 correspond to the STBC mechanism for which: - two spatial flows (Nss=2) are coded in three space-time flows (NSTS = 3); - three spatial flows (Nss=3) are coded in four space-time flows (NSTS = 4). Wi-Fi Integration to the 4G Mobile Network MCS values between 0 and 15, with a guard interval of 800 ns and a bandwidth of 20 MHz are required. Other MCS values, 400 ns guard interval and 40 MHz bandwidth are optional. The MCS value of 32 has the characteristics described in