TY - GEN

T1 - Phase modulated communication with low-resolution ADCs

AU - Gayan, Samiru

AU - Inaltekin, Hazer

AU - Senanayake, Rajitha

AU - Evans, Jamie

PY - 2019

Y1 - 2019

N2 - This paper considers a low-resolution wireless communication system in
which transmitted signals are corrupted by fading and additive noise.
First, a universal lower bound on the average symbol error probability
(SEP), correct for all M-ary modulation schemes, is obtained when the
number of quantization bits is not enough to resolve M signal points.
Second, in the special case of M-ary phase shift keying (M-PSK), the
optimum maximum likelihood detector for equi-probable signal points is
derived. Third, utilizing the structure of the derived optimum receiver,
a general average SEP expression for the M-PSK modulation with n-bit
quantization is obtained when the wireless channel is subject to fading
with a circularly-symmetric distribution. Finally, an extensive
simulation study of the derived analytical results is presented for
general Nakagami-m fading channels. It is observed that a transceiver
architecture with n-bit quantization is asymptotically optimum in terms
of communication reliability if n ≥ log
2
M + 1. That is, the decay exponent for the average SEP is the same and
equal to m with infinite-bit and n-bit quantizers for n ≥ log
2
M + 1. On the other hand, it is only equal to 1/2 and 0 for n = log
2
M and n ≥ log
2
M, respectively. Hence, for fading environments with a large value of
m, using an extra quantization bit improves communication reliability
significantly.

AB - This paper considers a low-resolution wireless communication system in
which transmitted signals are corrupted by fading and additive noise.
First, a universal lower bound on the average symbol error probability
(SEP), correct for all M-ary modulation schemes, is obtained when the
number of quantization bits is not enough to resolve M signal points.
Second, in the special case of M-ary phase shift keying (M-PSK), the
optimum maximum likelihood detector for equi-probable signal points is
derived. Third, utilizing the structure of the derived optimum receiver,
a general average SEP expression for the M-PSK modulation with n-bit
quantization is obtained when the wireless channel is subject to fading
with a circularly-symmetric distribution. Finally, an extensive
simulation study of the derived analytical results is presented for
general Nakagami-m fading channels. It is observed that a transceiver
architecture with n-bit quantization is asymptotically optimum in terms
of communication reliability if n ≥ log
2
M + 1. That is, the decay exponent for the average SEP is the same and
equal to m with infinite-bit and n-bit quantizers for n ≥ log
2
M + 1. On the other hand, it is only equal to 1/2 and 0 for n = log
2
M and n ≥ log
2
M, respectively. Hence, for fading environments with a large value of
m, using an extra quantization bit improves communication reliability
significantly.

UR - http://www.scopus.com/inward/record.url?scp=85070226270&partnerID=8YFLogxK

U2 - 10.1109/ICC.2019.8761177

DO - 10.1109/ICC.2019.8761177

M3 - Conference proceeding contribution

AN - SCOPUS:85070226270

SN - 9781538680896

SP - 1

EP - 7

BT - 2019 IEEE International Conference on Communications (ICC)

PB - Institute of Electrical and Electronics Engineers (IEEE)

CY - Piscataway, NJ

T2 - 2019 IEEE International Conference on Communications, ICC 2019

Y2 - 20 May 2019 through 24 May 2019

ER -