A polyphase-filter-based FFT for DFT calculation in LTE uplink

Yanbin Yao; Yongtao Su; Shoujun Huang; Jinglin Shi

doi:10.1109/ICC.2013.6655328

A polyphase-filter-based FFT for DFT calculation in LTE uplink

Yanbin Yao, Yongtao Su, Shoujun Huang, Jinglin Shi

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

1 Citation (Scopus)

Abstract

In LTE uplink, a DFT with 34 possible lengths is performed. The traditional method directly transforms the sequences with different lengths by using the mixed-radix FFT which is not appropriate to apply on the DSP processor only supplying radix-2 butterfly hardware especially. In this paper, we resample the arbitrary-length input sequence so that a 2ⁿ-point FFT can be applied by using the polyphase filter. Theoretical analysis demonstrates the equivalence of the proposed polyphase-filter-based FFT (PF-FFT) and the original DFT. Moreover, the PF-FFT also keeps low complexity and good fixed-point performance.

Original language	English
Title of host publication	ICC 2013
Subtitle of host publication	IEEE International Conference on Communications : proceedings
Editors	Dong-In Kim, Peter Mueller
Place of Publication	Piscataway, NJ
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	4771-4775
Number of pages	5
ISBN (Electronic)	9781467331227
DOIs	https://doi.org/10.1109/ICC.2013.6655328
Publication status	Published - 2013
Externally published	Yes
Event	IEEE International Conference on Communications - Budapest, Hungary Duration: 9 Jun 2013 → 13 Jun 2013

Other

Other	IEEE International Conference on Communications
Country/Territory	Hungary
City	Budapest
Period	9/06/13 → 13/06/13

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10.1109/ICC.2013.6655328

Cite this

@inproceedings{b16027e1ca054623b2447d014b59c353,

title = "A polyphase-filter-based FFT for DFT calculation in LTE uplink",

abstract = "In LTE uplink, a DFT with 34 possible lengths is performed. The traditional method directly transforms the sequences with different lengths by using the mixed-radix FFT which is not appropriate to apply on the DSP processor only supplying radix-2 butterfly hardware especially. In this paper, we resample the arbitrary-length input sequence so that a 2n-point FFT can be applied by using the polyphase filter. Theoretical analysis demonstrates the equivalence of the proposed polyphase-filter-based FFT (PF-FFT) and the original DFT. Moreover, the PF-FFT also keeps low complexity and good fixed-point performance.",

author = "Yanbin Yao and Yongtao Su and Shoujun Huang and Jinglin Shi",

year = "2013",

doi = "10.1109/ICC.2013.6655328",

language = "English",

pages = "4771--4775",

editor = "Dong-In Kim and Peter Mueller",

booktitle = "ICC 2013",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

address = "United States",

note = "IEEE International Conference on Communications ; Conference date: 09-06-2013 Through 13-06-2013",

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Yao, Y, Su, Y, Huang, S & Shi, J 2013, A polyphase-filter-based FFT for DFT calculation in LTE uplink. in D-I Kim & P Mueller (eds), ICC 2013: IEEE International Conference on Communications : proceedings. Institute of Electrical and Electronics Engineers (IEEE), Piscataway, NJ, pp. 4771-4775, IEEE International Conference on Communications, Budapest, Hungary, 9/06/13. https://doi.org/10.1109/ICC.2013.6655328

A polyphase-filter-based FFT for DFT calculation in LTE uplink. / Yao, Yanbin; Su, Yongtao; Huang, Shoujun et al.
ICC 2013: IEEE International Conference on Communications : proceedings. ed. / Dong-In Kim; Peter Mueller. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2013. p. 4771-4775.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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T1 - A polyphase-filter-based FFT for DFT calculation in LTE uplink

AU - Yao, Yanbin

AU - Su, Yongtao

AU - Huang, Shoujun

AU - Shi, Jinglin

PY - 2013

Y1 - 2013

N2 - In LTE uplink, a DFT with 34 possible lengths is performed. The traditional method directly transforms the sequences with different lengths by using the mixed-radix FFT which is not appropriate to apply on the DSP processor only supplying radix-2 butterfly hardware especially. In this paper, we resample the arbitrary-length input sequence so that a 2n-point FFT can be applied by using the polyphase filter. Theoretical analysis demonstrates the equivalence of the proposed polyphase-filter-based FFT (PF-FFT) and the original DFT. Moreover, the PF-FFT also keeps low complexity and good fixed-point performance.

AB - In LTE uplink, a DFT with 34 possible lengths is performed. The traditional method directly transforms the sequences with different lengths by using the mixed-radix FFT which is not appropriate to apply on the DSP processor only supplying radix-2 butterfly hardware especially. In this paper, we resample the arbitrary-length input sequence so that a 2n-point FFT can be applied by using the polyphase filter. Theoretical analysis demonstrates the equivalence of the proposed polyphase-filter-based FFT (PF-FFT) and the original DFT. Moreover, the PF-FFT also keeps low complexity and good fixed-point performance.

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U2 - 10.1109/ICC.2013.6655328

DO - 10.1109/ICC.2013.6655328

M3 - Conference proceeding contribution

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EP - 4775

BT - ICC 2013

A2 - Kim, Dong-In

A2 - Mueller, Peter

PB - Institute of Electrical and Electronics Engineers (IEEE)

CY - Piscataway, NJ

T2 - IEEE International Conference on Communications

Y2 - 9 June 2013 through 13 June 2013

ER -

A polyphase-filter-based FFT for DFT calculation in LTE uplink

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