ITU Kaleidoscope 2016 ICTs for a Sustainable World PAPR Reduction in - - PowerPoint PPT Presentation

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ITU Kaleidoscope 2016 ICTs for a Sustainable World PAPR Reduction in - - PowerPoint PPT Presentation

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ITU Kaleidoscope 2016 ICTs for a Sustainable World PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme Ahmad R. Sharafat Tarbiat Modares University, Tehran, Iran sharafat@ieee.org Bangkok, Thailand 14-16 November 2016 Outline

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ITU Kaleidoscope 2016

ICTs for a Sustainable World PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme

Ahmad R. Sharafat Tarbiat Modares University, Tehran, Iran sharafat@ieee.org

Bangkok, Thailand 14-16 November 2016

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

1

Introduction

2

SC-FDMA

3

Nyquist-I Pulse Shaping

4

Proposed Pulse Shaping Scheme

5

Simulation Results

6

Conclusions

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 2 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Introduction

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Introduction

OFDM SC-FDMA Sub-Carrier Mapping PAPR Reduction

Linear Non-Linear

Our Pulse Shaping Scheme

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 4 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

SC-FDMA

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 5 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

SC-FDMA

PAPR =

max

0≤k≤M×L−1 |sk|2

E{|sk|2}

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 6 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Nyquist-I Pulse Shaping

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 7 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Nyquist-I Pulse Shaping

Nyquist-I Pulse Shaping Different Versions of Nyquist-I Pulse Shaping

Raised Cosine Root Raised Cosine Parametric Linear Pulses Parametric Exponential Pulses Parametric Linear Combination Pulses

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 8 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Proposed Pulse Shaping Scheme

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 9 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Proposed Pulse Shaping Scheme I

Combination of K pulse shaping methods h (t) =

K

∑

i=1

aihi (t)

  • s. t.

K

∑

i=1

ai = 1 Solving the problem for K = 3 Optimization problem min

µ,ν

|h (t1)| × |h (t2)|

  • s. t.

|h (t1)| > |h (t2)| where h (t) = µhPEP (t) + νhPLP(2) (t) + (1 − µ − ν) hPLP(1) (t)

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 10 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Proposed Pulse Shaping Scheme II

Impulse response of RC, modified PLP and our scheme.

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 11 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 12 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results I

Simulation Parameters

Parameter Value

  • No. of subcarriers

512

  • No. of used subcarriers

128 Sampling frequency 10 MHz Oversampling factor 4 Roll-off factor (α) 0.22 Sub-carrier mapping interleaved

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 13 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results I

CCDF of PAPR for SC-IFDMA with QPSK for µ = 1 and ν ∈ [0, 2].

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 14 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results II

CCDF of PAPR for SC-IFDMA with QPSK for µ = 1 and ν ∈ [2, 100]

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 15 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results III

CCDF of PAPR for SC-IFDMA with QPSK via different schemes.

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 16 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results IV

Impulse response of RC, PLP, PEP and modified PLP schemes.

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 17 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results V

CCDF of PAPR for SC-IFDMA with QPSK via RC and modified PLP.

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 18 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results VI

Impulse response of the RC and modified PLP schemes.

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 19 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results VII

Frequency response of RC and modified PLP schemes.

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 20 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results VIII

CCDF of PAPR for SC-IFDMA with QPSK different schemes.

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 21 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results IX

Frequency response of RC, PLCP, modified PLP, and our schemes.

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 22 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation Results I

Required time to generate a transmit string in different pulse shaping schemes (parallel filters)

Pulse Shaping SC-IFDMA QPSK(µs) 16QAM(µs) RC 643.74 720.79 RRC 644.73 722.58 PLP 637.06 718.92 PEP 643.56 717.96 PP (n = 2) 637.44 719.50 PLCP (µ = 1.6) 687.09 755.12 Proposed (µ = 1 and ν = 2) 710.26 774.42

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 23 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation results I

Required time to generate a transmit string in different pulse shaping schemes (combined filters)

Pulse Shaping SC-IFDMA QPSK(µs) 16QAM(µs) RC 643.74 720.79 RRC 644.73 722.58 PLP 637.06 718.92 PEP 643.56 717.96 PP (n = 2) 637.43 719.50 PLCP (µ = 1.6) 637.39 719.23 Proposed (µ = 1 and ν = 2) 645.31 720.59

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 24 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Simulation results

Average values and variances of PAPR for different pulse shaping schemes Pulse Shaping

QPSK 16QAM 64QAM β σ2 β σ2 β σ2

RC 4.45 0.11 5.49 0.32 5.76 0.32 RRC 3.53 0.05 5.02 0.14 5.55 0.14 PLP 3.93 0.07 5.21 0.25 5.54 0.25 PEP 3.77 0.07 5.12 0.24 5.48 0.24

PP (n = 2)

3.10 0.04 4.81 0.15 5.27 0.18 PLCP (µ = 1.6) 3.70 0.08 5.09 0.23 5.45 0.23 Convex (d = 5) 3.90 0.16 4.99 0.23 5.39 0.21 Concave (d = 1) 3.64 0.08 5.04 0.25 5.42 0.22 Proposed 2.34 0.02 4.41 0.08 5.09 0.10

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Conclusions

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Conclusions

We proposed a novel pulse shaping scheme to reduce PAPR in SC-FDMA systems, and compared its performance with other existing schemes via simulation The PAPR in our scheme is 2.11 dB, 1.08 dB, and 0.67 dB less than those in RC pulse shaping for QPSK, 16-QAM and 64-QAM respectively.

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 27 / 28

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Outline Introduction SC-FDMA Nyquist-I Pulse Shaping Proposed Pulse Shaping Scheme Simulation Results Conclusions

Thank You

Naser Ahmadi-Moghaddam and Ahmad R. Sharafat PAPR Reduction in SC-FDMA via a Novel Combined Pulse-Shaping Scheme 28 / 28