Top > Search of International Patents > TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEPTION DEVICE, AND RECEPTION METHOD

TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEPTION DEVICE, AND RECEPTION METHOD

Foreign code F180009602
File No. 5697
Posted date Nov 16, 2018
Country WIPO
International application number 2017JP042820
International publication number WO 2018110279
Date of international filing Nov 29, 2017
Date of international publication Jun 21, 2018
Priority data
  • P2016-241637 (Dec 13, 2016) JP
Title TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEPTION DEVICE, AND RECEPTION METHOD
Abstract Provided is a transmission device of a single carrier frequency domain equalization scheme having a circuit for inserting a cyclic prefix (CP) and an overlap margin (OM), and a time domain windowing process circuit to which is input transmission symbols in which the CP and OM have been inserted. The time domain windowing process circuit multiplies an arbitrarily-defined time domain window function and suppresses out-of-band radiation power. In the time domain windowing process circuit, the window transition length of the time domain window function is at least the length of the CP.
Outline of related art and contending technology BACKGROUND ART
Currently, the mobile communication system as LTE-Advanced LTE(Long Term Evolution) and become the mainstream products is, the waveform of the downlink signals to the orthogonal frequency division multiplexing (OFDM: Orthogonal Frequency Division Multiplexing) method, the uplink signal of the waveform of the single carrier frequency domain equalization (Single Carrier Frequency-domain Equalization: SC-FDE) scheme has been used.The fifth generation mobile communication system (5 g system) is, in a further improvement of frequency utilization efficiency has been required, in order to realize a new signal waveform, the waveform shaping technology in the conventional method based on a research and development has been promoted.
However, the conventional waveform shaping technology is mainly based on the downlink of the OFDM system as is discussed, the uplink SC-FDE system of a small discussion.SC-FDE method is compared with the OFDM system the peak to average power ratio (Peak-to-Average Power Ratio; PAPR) is low and has a characteristic that, the transmitter power amplifier can be implemented for reduced back-off margin, the terminal side of the transmission waveform is very effective.On the other hand, SC-FDE scheme (Out-of-band emission of-band radiation power; OOBE) is high, in terms of frequency utilization efficiency has been a problem in that the suppression of the OOBE.
Out-of-band radiation power in a low-pass filter (LPF) to suppress effective.However for example in LTE band 0.25MHz on both sides of the guard bandwidth is not left only on the order of at most.Within the guard band of the narrow-band radiation power is sufficient to implement the LPF to suppress the large calculation amount is required to scale.
The present inventors, without using the LPF (A) with respect to the OFDM signal transmission apparatus, a universal time axis from the window-type orthogonal frequency division multiplex (Universal time-domain windowed OFDM; UTW-OFDM) method (see Patent Document 1) has been proposed.
Scope of claims (In Japanese)請求の範囲 [請求項1]
 シングルキャリア周波数領域等化方式の送信装置において、
 サイクリックプレフィックス(CP)およびオーバーラップマージン(OM)を挿入する回路と、
 前記CPおよびOMが挿入された送信シンボルが入力される時間軸ウィンドウイング処理回路を有し、
 前記時間軸ウィンドウイング処理回路は、任意の時間軸窓関数を乗じ、帯域外輻射電力を抑圧するようになされ、
 前記時間軸ウィンドウイング処理回路において、前記時間軸窓関数の窓遷移長がCPの長さ以上である送信装置。

[請求項2]
 シングルキャリア周波数領域等化方式の送信装置において、
 CPおよびOMが挿入された送信シンボルをリソースエレメント毎に複数のグループに分割し、各グループのシンボルが入力される複数の時間軸ウィンドウイング処理回路を有し、
 前記複数の時間軸ウィンドウイング処理回路のそれぞれは、任意の時間軸窓関数を乗じ、帯域外輻射電力を抑圧するようになされた送信装置。

[請求項3]
 SC-FDE方式の受信データシンボルに対してFFT処理、チャネル等化、IDFT処理を行うことによって得られた受信一次変調シンボルに対して、送信側で乗算している窓関数の逆数を乗算するDe-windowing処理を行うことで振幅レベルを補償するようにした受信装置。

[請求項4]
 シングルキャリア周波数領域等化方式の送信方法において、
 CPおよびOMを挿入する処理と、
 前記CPおよびOMが挿入された送信シンボルが入力される時間軸ウィンドウイング処理を有し、
 前記時間軸ウィンドウイング処理は、任意の時間軸窓関数を乗じ、帯域外輻射電力を抑圧するようになされた送信方法。

[請求項5]
 SC-FDE方式の受信データシンボルに対してFFT処理、チャネル等化、IDFT処理を行うことによって得られた受信一次変調シンボルに対して、送信側で乗算している窓関数の逆数を乗算するDe-windowing処理を行うことで振幅レベルを補償するようにした受信方法。

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • KYOTO UNIVERSITY
  • Inventor
  • MIZUTANI, Keiichi
  • HARADA, Hiroshi
  • MATSUMURA, Takeshi
  • KODAMA, Yosuke
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
Please contact us by e-mail or facsimile if you have any interests on this patent. Thanks.

PAGE TOP

close
close
close
close
close
close