Arman Farhang - New Waveform Candidates for 5G: Options and Opportunities

Transcript

1. New Waveform Candidates for 5G: Options and Opportunities Arman&Farhang& TRINITY COLLEGE D U B L I N June 16, 2015 Supélec campus de Rennes
2. 1" Impact of timing and frequency offsets on multicarrier waveform candidates for 5G
3. Waveform Candidates for 5G Waveform&Candidates& Linear&pulse&shaping& Circular&pulse&shaping& Universal&filtered&mul;carrier&(UFMC)& & Filter&bank&mul;carrier&(FBMC)& Generalized&frequency&division& mul;plexing&(GFDM)& Circular&filter&bank&mul;carrier&(CHFBMC)& 2"
4. Fig.&1.&UFMC&system&model&in&the&uplink&[1].& Linear Pulse Shaping •  Universal"filtered"mul2carrier"(UFMC)" [1]&V.&Vakilian,&T.&Wild,&F.&Schaich,&S.&Ten&Brink,&and&J.HF.&Frigon,&“UniversalHfiltered&mul;Hcarrier&technique&for&wireless&systems& beyond&lte,”&in&IEEE&Globecom&Workshops&(GC&Wkshps)&2013,&pp.&223–228.& 3"
5. Linear Pulse Shaping •  UFMC"signal"in"frequency"domain" Fig.&2.&UFMC&signal&representa;on&in&frequency&domain&and&its&comparison&with&OFDM&[1].& 4"
6. Linear Pulse Shaping •  Filter"bank"mul2carrier"(FBMC)" Fig.&3.&Filter&bank&mul;carrier&(FBMC)&system&model.& 5"
7. Circular Pulse Shaping Fig.&4.&Filter&bank&mul;carrier&with&circular&pulse&shaping.& 6"
8. Circular Pulse Shaping Fig.&5.&TimeHfrequency&overlapping.& 7"
9. Circular Pulse Shaping •  OFDM"vs."GFDM"or"CJFBMC"data"packet" OFDM" GFDM"or"CJFBMC" 8"
10. Linear vs. Circular Pulse Shaping Fig.&6.&Linear&FBMC&transmit&signal.& Fig.&7.&Circular&FBMC&transmit&signal.& 9"
11. Impact of Synchronization Errors on Waveform Candidates for 5G Receiver"window" User"1" User"2" User"3" User"4" Fig.&8.&Timing&misalignment&between&different&users.& Fig.&9.&Frequency&misalignment&between&different& users.& 10"
12. Timing and Frequency Misalignment Transmit"signal"of"user" Received"signal"at"the"base"sta2on" Signal"of"user"""""aTer"going"through" the"channel" TransmiUed"symbols" es2mated"at"the"base" sta2on" 11"
13. Sensitivity to Timing Offset Fig.&10.&Mul;ple&access&interference&(MAI)&as&a&func;on&of&;ming& offset&for&different&waveforms.& 12"
14. Sensitivity to Frequency Offset Fig.&11.&Mul;ple&access&interference&(MAI)&as&a&func;on&of& frequency&offset&for&different&waveforms.& 13"
15. Sensitivity to Frequency Offset Fig.&12.&Amplitude&spectrum&of&the&receiver&matched&filter&(MF)&in&CHFBMC&and&zeroHforcing&(ZF)&detector& in&GFDM.& 14"
16. Sensitivity to Timing and Frequency Offset Fig.&13.&Bit&error&rate&(BER)&performance&of&different&waveforms.&The& normalized&TOs&and&CFOs&are&selected&randomly&between&H0.5&and&+0.5.& 15"
17. Sensitivity to Timing and Frequency Offset Fig.&14.&BER&performance&of&different&waveforms.&The&users&are&quasiH synchronous&in&;me&and&the&CFO&errors&are&selected&randomly&between& H0.5&and&+0.5.& 16"
18. Conclusions •  To"reduce"sensi2vity"to"2ming"and"frequency"offsets,"windows" with"smooth"edges"should"be"applied"to"both"transmiUer"and" receiver." •  Among"all"the"waveforms,"FBMC"and"UFMC"par2ally"sa2sfy"this" condi2on."" •  OFDM,"GFDM,"and"CJFBMC"fail"our"tests"as"they"lack"windowing" in"their"conven2onal"form."However,"improvements"are" possible"in"these"waveforms." 17"
19. 18" Frequency Spreading Equalization in Multicarrier Massive MIMO
20. New Waveforms and Massive MIMO for 5G 19" Waveform&Candidates& Linear&pulse&shaping& Circular&pulse&shaping& Filter&bank&mul;carrier&(FBMC)& & Universal&filtered&mul;carrier&(UFMC)& Generalized&frequency&division& mul;plexing&(GFDM)& Circular&filter&bank&mul;carrier&(CHFBMC)&
21. •  Massive"MIMO:"a"mul2user"system"similar"to"code" division"mul2plexing"(CDMA)"systems" Base" sta2on" MT1" . " . " . MTK" . " . " . H11" HKM" 1" M" 20" New Waveforms and Massive MIMO for 5G
22. •  CMT"modula2on" (a)&Spectra&of&baseband&data&streams&(black)&and&ves;gial&side&band&(VSB)&por;on&of&each&(other&colors).&(b)&CMT& spectrum&consis;ng&of&modulated&versions&of&the&VSB&spectra&of&the&baseband&data&streams.&VSB&signals&are&modulated& to&the&subcarrier&frequencies&f 0 ,&f 1 ,&"#"#"#,&fN−1 .& [1]&B.&FarhangHBoroujeny&and&C.&(George)&Yuen,&“Cosine&modulated&and&offset&qam&filter&bank&mul;carrier&techniques:&a& con;nuousH;me&prospect,”&EURASIP#Journal#on#Applied#Signal#Processing,#2010,#special#issue#on#Filter#Banks#for#Next# GeneraEon#MulEcarrier#Wireless#CommunicaEons,&vol.&2010,&p.&16&pages,&2010.& 21" Cosine Modulated Multitone (CMT)
23. 22" Frequency Spreading implementation of CMT
24. 23" Frequency Spreading implementation of CMT
25. •  SelfJequaliza2on"property"of"FBMC,"[2],"makes"it"a"viable"candidate"for" MIMO"applica2on." " •  CMT"offers"the"following"advantages"over"OFDM:" –  Higher""bandwidth"efficiency" –  Lower"sensi2vity"to"CFO" –  Lower"PAPR" –  More"flexible"carrier"aggrega2on" –  Blind"channel"equaliza2on"capability"enabling"pilot"decontamina2on,"[3]" 24" Filter Bank Multicarrier for Massive MIMO ! [2]&A.&Farhang,&N.&Marchej,&L.&Doyle,&B.&FarhangHBoroujeny,&“Filter#Bank#MulEcarrier#for#Massive#MIMO”,&In&Proc.&Of&IEEE& VTCHFall&2014,&Vancouver.& [3]&A.&Farhang,&&A.&Aminjavaheri,N.&Marchej,&L.&Doyle,&B.&FarhangHBoroujeny,&“Pilot#decontaminaEon#in#CMTMbased#massive# MIMO#Networks”,&In&proc.&of&ISWCS&2014.&Barcelona.&
26. 25" Minimum Mean Square Error Frequency Spreading Equalization Number of receive antennas Number of users
27. 26" Minimum Mean Square Error Frequency Spreading Equalization MMSE estimates of MMSE filter tap weights Spreading matrix Phase adjustment matrix
28. •  Single"user"case" 27" Numerical Results (a)&and&(b)&compare&the&signal&to&interference&ra;o&(SIR)&performance&of&the&MF&linear&combining&technique&for&the& cases&of&8&and&16&subcarriers,&respec;vely,&for&different&number&of&receive&antennas,&Nr .&&
29. Numerical Results SIR&performance&&comparison&between&polyphase&implementa;on&(PPN)&and&frequency&spreading&FBMC&systems&having&16& subcarriers&&for&different&number&of&receive&antennas.&
30. •  Mul2user"case" Numerical Results Signal&to&noise&plus&interference&(SINR)&performance&of&MMSE&linear&combining&for&the&case&of&having&16&subcarriers&and&6&users& where&the&receiver&input&signal&to&noise&ra;o&is&H1dB.&
31. •  An"effec2ve"MMSE"equaliza2on"scheme"for"FBMCJbased" massive"MIMO"systems"was"derived." •  Frequency"spreading"equaliza2on"enables"us"to"widen"the" subcarrier"bands"further"than"what"was"proposed"in"[2]."" •  Further"widening"the"subcarrier"bands"in"frequency"brings" improvements"in"terms"of"bandwidth"efficiency,"robustness"to" carrier"frequency"offset,"peakJtoJaverage"power"ra2o"and" latency"compared"with"polyphase"based"FBMC"systems." Conclusions [2]&A.&Farhang,&N.&Marchej,&L.&Doyle,&B.&FarhangHBoroujeny,&“Filter#Bank#MulEcarrier#for#Massive#MIMO”,&In&Proc.&Of&IEEE& VTCHFall&2014,&Vancouver.&
32. Thank"you" Any"comments"or"ques2ons?"