$.$ Throughput with QPSK modulation:

$$ For voice channelsa$(64$kpbs$)$:

o With a time frame of $1\mathrm{.}0$ ms$,$ the throughput is $19\mathrm{.}20$ Mbps$.$

o With a time frame of $2\mathrm{.}0$ ms$,$ the throughput is $19\mathrm{.}20$ Mbps$.$

o With a time frame of $4\mathrm{.}0$ ms$,$ the throughput is $15\mathrm{.}36$ Mbps$.$

o With a time frame of $8\mathrm{.}0$ ms$,$ the throughput is $7\mathrm{.}68$ Mbps$.$

$$ For digital data:

o With a time frame of $1\mathrm{.}0$ ms$,$ the throughput is $38\mathrm{.}40$ Mbps$.$

o With a time frame of $2\mathrm{.}0$ ms$,$ the throughput is $38\mathrm{.}40$ Mbps$.$

o With a time frame of $4\mathrm{.}0$ ms$,$ the throughput is $30\mathrm{.}72$ Mbps$.$

o With a time frame of $8\mathrm{.}0$ ms$,$ the throughput is $15\mathrm{.}36$ Mbps$.$

$2.$ Throughput for different modulation schemes:

$$ With a timeframe of $1\mathrm{.}0$ms:

o BPSK: $9\mathrm{.}60$ Mbps

o QPSK: $19\mathrm{.}20$ Mbps

o $8-$PSK: $28\mathrm{.}80$ Mbps

o $16-$PSK: $38\mathrm{.}40$ Mbps

$$ With a timeframe of $2\mathrm{.}0$ms:

o BPSK: $9\mathrm{.}60$ Mbps

o QPSK: $19\mathrm{.}20$ Mbps

o $8-$PSK: $28\mathrm{.}80$ Mbps

o $16-$PSK: $38\mathrm{.}40$ Mbps

$$ With a timeframe of $8\mathrm{.}0$ms:

o BPSK: $4\mathrm{.}80$ Mbps

o QPSK: $7\mathrm{.}68$ Mbps

o $8-$PSK: $11\mathrm{.}52$ Mbps

o $16-$PSK: $15\mathrm{.}36$ Mbps