TR201714179A2 - A SYSTEM AND METHOD WITH ARTIFICIAL NOISE AND PAPR REDUCTION IN OFDM TECHNIQUE - Google Patents
A SYSTEM AND METHOD WITH ARTIFICIAL NOISE AND PAPR REDUCTION IN OFDM TECHNIQUE Download PDFInfo
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Abstract
Bu buluş, OFDM (Orthogonal Frequency Division Multiplexing ? Dik Frekans Bölmeli Çoklama) tekniğinde PAPR (Peak-to-Avarage Power Ratio ? Tepe-Ortalama Güç Oranı) değerinin fiziksel katman güvenliği için kullanılan yapay gürültü (artificial noise) kullanımı ile istenilen düzeyde tutulmasını sağlayan bir sistem (1) ve yöntem (100) ile ilgilidir. Buluş konusu sistem (1); veri sağlama birimi (2), gürültü üretim birimi (3), sembol dönüştürme birimi (4), dönüştürme birimi (5) ve kontrol ve karar biriminden (6) oluşmaktadır.This invention provides the desired level of PAPR (Peak-to-Avarage Power Ratio? Peak-Average Power Ratio) in OFDM (Orthogonal Frequency Division Multiplexing) technique with the use of artificial noise used for physical layer security. It relates to a system (1) and method (100). The inventive system (1); The data acquisition unit (2) consists of the noise generation unit (3), the symbol conversion unit (4), the conversion unit (5) and the control and decision unit (6).
Description
TARIFNAME OFDM TEKNIGINDE YAPAY GÜRÜLTÜ ILE PAPR AZALTI MI SAGLAYAN BIR SISTEM VE YÖNTEM Teknik Alan Bu bulus, OFDM (Orthogonal Frequency Division Multiplexing - Dik Frekans Bölmeli Çoklama) tekniginde PAPR (Peak-to-Avarage Power Ratio - Tepe- Ortalama Güç Orani) degerinin fiziksel katman güvenligi için kullanilan yapay gürültü (artificial noise) kullanimi ile istenilen düzeyde tutulmasini saglayan bir sistem ve yöntem ile ilgilidir. Önceki Teknik Günümüzde OFDM teknigi yeni nesil haberlesme sistemlerinde bant genisligini verimli kullanmasi ve yüksek veri iletim hizlarina ulasabilmesi sebeplerinden dolayi haberlesme sektöründe önemli bir yere sahiptir. Ancak, bu teknigin en önemli dezavantajlarindan biri özellikle tek tasiyicili sistemlerle karsilastirildiginda PAPR degerlerinin yüksek olmasidir. Yüksek PAPR degerlerinin SQNR”yi (Signal-to-Quantization Noise Ratio - Sinyal Niceleme Gürültü Orani) düsürdügü ve bunu takiben analog-dijital ve dijital-analog dönüstürücülerin performans kayiplarina maruz kaldiklari bilinmektedir. DESCRIPTION PAPR REDUCTION WITH ARTIFICIAL NOISE IN OFDM TECHNIQUE A SYSTEM AND METHOD THAT PROVIDES Technical Area This invention, OFDM (Orthogonal Frequency Division Multiplexing - Orthogonal Frequency PAPR (Peak-to-Avarage Power Ratio) in Split Multiplexing Average Power Ratio) is an artificial value used for physical layer security. It is a method that keeps it at the desired level with the use of artificial noise. It's about the system and method. Prior Art Today, OFDM technique reduces bandwidth in new generation communication systems. due to its efficient use and its ability to reach high data transmission speeds. Therefore, it has an important place in the communication industry. However, this technique is One of its major disadvantages is especially with single carrier systems. compared to the higher PAPR values. High PAPR SQNR (Signal-to-Quantization Noise Ratio - Signal Quantization) Noise Ratio), followed by analog-to-digital and digital-to-analog Transducers are known to suffer performance losses.
Teknigin bilinen durumunda yer alan kullanimlarda, OFDM bazli sistemlerde birbirlerinden farkli olarak PAPR düsürme yöntemleri gelistirilmistir. Bu yöntemler genel olarak kirpma (clipping) teknigi, kodlama (coding) teknigi, karistirma (scrambling) teknigi, uyarlamali ön bozulma (adaptive predistortion) teknigi ve DFT (Discrete Fourier Transform) yayma teknigi olarak gruplandirilmaktadir. Bu tekniklerden kirpma teknigi, dogrusal olmayan doygunluk (saturation) degerlerinde tepe degerlerini azaltmaya yönelik kolay uygulanabilen bir teknik olmakla birlikte alt tasiyicilar arasi dikligi bozabildigi için frekans bandi içerisinde girisime sebep olmaktadir. Bu yaklasim, blok ölçekleme tekniginde, kirpma ve filtreleme tekniginde, tepe pencereleme tekniginde ve tepe kaldirma tekniginde kullanilmaktadir. In the usages in the state of the art, OFDM based systems Different from each other, PAPR reduction methods have been developed. This methods are generally clipping technique, coding technique, scrambling technique, adaptive predistortion technique and DFT (Discrete Fourier Transform) propagation technique. are grouped. Of these techniques, the clipping technique is non-linear. Easy to reduce peak values in saturation values Although it is a technique that can be applied, it can disrupt the perpendicularity between the lower carriers. It causes interference within the frequency band. This approach is block scaling technique, clipping and filtering technique, overhead windowing It is used in the technique of lifting the hill and in the technique of hill lifting.
Kodlama teknigi ise, PAPR düsürecek biçimde kod dizisinin seçilmesi seklinde uygulanmaktadir. Bu teknigin dezavantaji, dogru kod diziminin bulunmasinin zor olmasidir. Bu yaklasim, Reed Muller kod dizimi, Golay tümleyen dizisi ve Hadamard kod diziminde kullanilmaktadir. The coding technique, on the other hand, is the selection of the code sequence to reduce PAPR. is being implemented. The disadvantage of this technique is that it is difficult to find the correct code sequence. is that. This approach consists of Reed Muller encoding, Golay's complement array, and It is used in Hadamard coding.
Karistirma teknigi ise, OFDM giris dizindeki PAPR degerlerini en düsük seviyeye getirecek sembol dizilerinin seçilmesi ile gerçeklestirilmektedir. Bu teknik PAPR degerinin keskin bir degerin altina düsmesini garanti etmemektedir. The mixing technique is to set the PAPR values in the OFDM input directory to the lowest level. It is carried out by selecting the symbol sequences to bring. This technique is PAPR. does not guarantee that the value will fall below a sharp value.
Uyarlamali ön bozulma teknigi ise yüksek güçlü amfilerin (high power amplifier), dogrusal olmayan etkilerini dengelemektedir. Adaptive pre-distortion technique is used for high power amplifiers, offsets its non-linear effects.
DFT yayma tekniginde, giris sinyali DFT,ye göre bölünmekte ve iletilecek isaret ayrilmaktadir. Bu sayede daha küçük parçalar elde edilmektedir. In the DFT spreading technique, the input signal is divided according to the DFT and the signal to be transmitted is is separating. In this way, smaller parts are obtained.
Teknigin bilinen durumunda yer alan diger bir yaygin kullanimda ise, kablosuz haberlesme sistemlerinde verinin açik bir ortamdan iletilmesinden kaynaklanan çesitli güvenlik açiklarinin giderilmesi için fiziksel katman güvenligini saglamak adina yapay gürültü kullanilmaktadir. Literatürde siklikla geçen gizli dinleme saldirilari (eavesdropping, attacks), yasal olmayan kullanicinin yasal olan iletisim halindeki iki dinleyici arasindaki bilgileri elde etmesi durumudur. Bu durumu engellemek adina fiziksel katman güvenligi için kullanilan yapay gürültü büyük ölçüde basarili olmustur. dokümaninda, PAPR degerini düsürmek için kirpma gürültüleri üreterek iletisim sebekesinin verimliligini artiran bir OFDM iletisim sistemden bahsedilmektedir. In another common use in the state of the art, wireless arising from the transmission of data through an open medium in communication systems. Providing physical layer security to address various security vulnerabilities artificial noise is used. eavesdropping, which is frequently mentioned in the literature attacks (eavesdropping, attacks), illegal user's legal communication It is the situation of obtaining the information between two listeners in the state. This situation Artificial noise used for physical layer security to prevent large has been largely successful. communication by generating clipping noises to lower the PAPR value. An OFDM communication system that increases the efficiency of the network is mentioned.
Teknigin bilinen durumunda yer alan CN104618290 sayili Çin patent dokümaninda, gürültü yüksekligine ayrilmis bölüm ile PAPR degerinin kontrolünün saglanmasini ve PAPR degerinin artmasi durumunda gürültü yüksekligi artirilarak PAPR degerinin düsürülmesini saglayan bir OFDM sisteminden bahsedilmektedir. Chinese patent number CN104618290 in the state of the art In the document, it is stated that the PAPR value with the section devoted to the noise level noise control and increase the PAPR value. An OFDM that lowers the PAPR value by increasing the height system is mentioned.
Bulusun Kisa Açiklamasi Bu bulusun amaci, fiziksel katman güvenligi için kullanilan yapay gürültünün OFDM tekniginde olusan yüksek PAPR degerinin düsürülmesi için kullanimini gerçeklestiren bir sistem ve yöntem gerçeklestirmektir. Brief Description of the Invention The aim of this invention is to reduce artificial noise used for physical layer security. It is used to reduce the high PAPR value in OFDM technique. is to realize a system and method that performs
Bulusun Ayrintili Açiklamasi Bu bulusun amacina ulasmak için gerçeklestirilen “OFDM Tekniginde Yapay Gürültü Ile PAPR Azaltimi Saglayan Bir Sistem ve Yöntem” ekli sekillerde gösterilmis olup, bu sekillerden; Sekil-1 Bulus konusu sistemin sematik blok diyagramidir. Detailed Description of the Invention In order to reach the aim of this invention, “Artificial Art in the OFDM Technique” A System and Method That Provides PAPR Reduction with Noise” in the attached figures. has been shown, from these figures; Figure-1 is the sematic block diagram of the system that is the subject of the invention.
Sekil-2 Bulus konusu yönteme iliskin blok diyagramidir. Figure-2 is the block diagram of the method of the invention.
Sekillerde yer alan parçalar tek tek numaralandirilmis olup, bu numaralarin karsiliklari asagida verilmistir. 1 Sistem 2 Veri saglama birimi 3 Gürültü üretim birimi 4. Sembol birlestirme birimi Dönüstürme birimi 6 Kontrol ve karar birimi 100. Yöntem OFDM tekniginde yapay gürültü ile PAPR degerinin düsürülmesini saglayan bulus konusu sistem (1); - aldigi ve/veya ürettigi veri içeren OFDM sembollerini frekans alaninda (domain) tutan en az bir veri saglama birimi (2), - belirli tanimlar dogrultusunda frekans alaninda yapay gürültü sinyalleri üreten en az bir gürültü üretim birimi (3), - veri saglama birimi (2) ve gürültü üretim biriminden (3) frekans alaninda aldigi veri sembollerini ve yapay gürültüleri toplayan en az bir sembol birlestirme birimi (4), - sembol birlestirme biriminin (4) ilettigi veri sembolleri ve yapay gürültüyü içeren sinyali frekans alanindan zaman alanina dönüstüren en az bir dönüstürme birimi (5), - dönüstürme biriminden (5) aldigi zaman alaninda yer alan sinyalin PAPR degerini belirleyen, belirledigi PAPR degerini içerdigi belirli limit degerleri ile karsilastiran, karsilastirma sonucunda PAPR degerinin limit degerinden yüksek olmasi durumunda gürültü üretim birimine (3) sembol birlestirme birimi (4) bildirimde bulunan, PAPR degerinin limit degerinin altinda olmasi durumunda ise ilgili OFDM sinyalini gönderilmek üzere siraya alan en az bir kontrol ve karar birimi (6) içermektedir. (Sekil-1) Bulus konusu sistemde (1) yer alan veri saglama birimi (2), veri içeren OFDM sembollerini saglayan birimdir. Veri saglama birimi (2), verileri belirli birimlerden almakta ve/Veya üretebilmektedir. Veri saglama biriminin (2), frekans alaninda sinyaller içermekte ve bu sinyalleri belirli tanimlar dogrultusunda sembol birlestirme birimine (4) iletmektedir. The parts in the figures are numbered one by one. the responses are given below. 1 System 2 Data supply units 3 Noise generation units 4. Symbol combining unit conversion unit 6 Control and decision unit 100. Method In the OFDM technique, it provides the reduction of the PAPR value with artificial noise. the inventive system (1); - frequency of OFDM symbols containing data received and/or produced at least one data provisioning unit (2) holding the domain (domain), - artificial noise signals in the frequency domain according to certain definitions at least one noise generating unit (3) that produces - frequency from the data supply unit (2) and the noise generation unit (3) at least one that collects the data symbols and artificial noise it receives in the field a symbol combining unit (4), - data symbols transmitted by the symbol combination unit (4) and artificial converts the signal containing noise from the frequency domain to the time domain at least one conversion unit (5), - the signal in the time domain received from the conversion unit (5) It is determined by the specific PAPR value that determines the PAPR value it has determined. Compared with the limit values, as a result of the comparison, PAPR If the value is higher than the limit value, the noise generation PAPR, which notifies the symbol combination unit (4) to the unit (3) If the value is below the limit value, the relevant OFDM at least one control and decision queues the signal to be sent unit (6). (Figure 1) The data supply unit (2) in the system (1), which is the subject of the invention, is an OFDM containing data. is the unit that provides the symbols. The data provisioning unit (2) It can buy and/or produce from units. Data supply unit (2), frequency contains signals in the field and these signals are symbolized in line with certain definitions. transmits it to the combining unit (4).
Bulus konusu sistemde (1) yer alan gürültü üretim birimi (3), yapay gürültü sinyalleri olusturan birimdir. Gürültü üretim birimi (3), yetkili kullanicilarin degerlerini girdigi belirli parametreler dogrultusunda frekans alaninda gürültü sinyalleri üretmektedir. Gürültü üretim birimi (3), kontrol ve karar biriminden (6) bildirim aldiginda bir önceki gürültü sinyalinden farkli bir yapay gürültü sinyali üretmekte ve sembol birlestirme birimine (4) iletmektedir. Bulusun bir uygulamasinda gürültü üretim birimi (3), kontrol ve karar biriminden (6) aldigi bildirim içeriginde yer alan geribildirim degerleri dogrultusunda gürültü sinyali üretim parametre degerlerini belirlemekte ve yapay gürültü sinyalini ilgili degerler dogrultusunda üretmektedir. Noise generation unit (3) in the inventive system (1), artificial noise is the unit that generates the signals. Noise generation unit (3), authorized users noise in the frequency domain in line with certain parameters to which it enters values generates signals. Noise generation unit (3), control and decision unit (6) a different artificial noise signal from the previous noise signal when it receives a notification. generates it and transmits it to the symbol combination unit (4). find one noise generation unit (3), control and decision unit (6). noise signal in accordance with the feedback values included in the notification content. determines the production parameter values and converts the artificial noise signal to the corresponding values. manufactures accordingly.
Bulus konusu sistemde (1) yer alan sembol birlestirme birimi (4), veri sembolleri ile yapay gürültü sinyallerini birlestiren birimdir. Sembol birlestirme birimi (4), veri saglama biriminden (2) aldigi veri içeren OFDM sembollerini ve gürültü üretim biriminden (3) aldigi yapay gürültü sinyallerini frekans alaninda bilestirmektedir. Bulusun tercih edilen uygulamasinda sembol birlestirme birimi (4), birlestirme islemi olarak OFDM sembolleri ile yapay gürültü sinyallerini frekans alaninda toplamaktadir. Sembol birlestirme birimi (4), birlestirme islemi sonucunda olusturdugu sinyali dönüstürme birimine (5) iletmektedir. Symbol combination unit (4) in the inventive system (1), data symbols It is a unit that combines artificial noise signals with Symbol combination unit (4), OFDM symbols containing data received from the data supply unit (2) and noise the artificial noise signals it receives from the generation unit (3) in the frequency domain. reports. In the preferred embodiment of the invention, the symbol combination unit (4) combines the artificial noise signals with OFDM symbols as the coupling process. collects in the frequency domain. Symbol combining unit (4), combining operation As a result, it transmits the signal it creates to the conversion unit (5).
Sembol birlestirme birimi (4), veri saglama biriminden (2) aldigi OFDM sembolünü kontrol ve karar biriminden (6) geribildirim alana kadar kayit altinda tutmakta ve yeni sembol almamaktadir. Kontrol ve karar biriminden (6) OFDM sinyalinin farkli bir yapay gürültü sinyali ile birlestirilmesini bildiren bir geribildirim almasi durumunda sembol birlestirme birimi (4), gürültü üretim biriminin (3) yeni bir yapay gürültü sinyali iletmesini beklemekte ve yapay gürültü sinyalini aldiginda birlestirme islemini gerçeklestirmektedir. Sembol birlestirme birimi (4), kontrol ve karar biriminden (6) birlestirilen sinyalin PAPR degerinin uygun oldugunu bildiren geribildirimi alana kadar ilgili OFDM sembolü ile farkli yapay gürültü sinyallerini birlestirme islemlerini tekrarlamaktadir. The symbol combination unit (4) receives OFDM from the data acquisition unit (2). The symbol is kept under record until feedback is received from the control and decision unit (6). and does not receive any new symbols. OFDM from the control and decision unit (6) signal to be combined with a different artificial noise signal. If it receives feedback, the symbol combining unit (4) will generate noise. waits for the unit (3) to transmit a new artificial noise signal and When it receives the noise signal, it performs the merging process. Symbol combining unit (4), control and decision unit (6) of the combined signal PAPR the corresponding OFDM symbol until you receive the feedback that the value is appropriate. It repeats the process of combining different artificial noise signals with
Kontrol ve karar biriminin (6) birlestirilen sinyalin iletime uygun oldugunu bildiren geribildirim Iletmesi durumunda sembol birlestirme birimi (4), veri saglama biriminden (2) yeni bir OFDM sembolü almaktadir. The control and decision unit (6) confirms that the combined signal is suitable for transmission. Indicating feedback In case of transmitting, the symbol combination unit (4), data receives a new OFDM symbol from the checksum (2).
Bulus konusu sistemde (1) yer alan dönüstürme birimi (5), frekans alaninda yer alan sinyali zaman alanina dönüstüren birimdir. Dönüstürme birimi (5), sembol birlestirme biriminden (4) aldigi OFDM sembolü ile yapay gürültü sinyalinin birlestirilmesi ile olusturulan frekans alanindaki sinyali zaman alanina dönüstürmektedir. Bulusun tercih edilen uygulamasinda dönüstürme birimi (5), dönüstürme islemi için IFFT (Inverse Fast Fourier Transform - Ters Hizli Fourier Dönüsümü) yöntemini kullanmaktadir. Dönüstürme islemini tamamlayan dönüstürme birimi (5), zaman alaninda elde ettigi sinyali kontrol ve karar birimine (6) iletmektedir. The conversion unit (5) in the inventive system (1) is located in the frequency domain. is the unit that converts the field signal to the time domain. Conversion unit (5), symbol of the OFDM symbol received from the splicing unit (4) and the artificial noise signal. The signal in the frequency domain created by combining is converting. In the preferred embodiment of the invention, the conversion unit (5) is IFFT (Inverse Fast Fourier Transform - Inverse Fast Fourier) It uses the transform method. Complete the conversion The conversion unit (5) converts the signal obtained in the time domain to the control and decision unit. (6) transmits.
Bulus konusu sistemde (1) yer alan kontrol ve karar birimi (6), sinyalin PAPR degerini kontrol eden ve kontrol sonucuna göre aksiyon alan birimdir. Kontrol ve karar birimi (6), dönüstürme biriminden (5) zaman alaninda aldigi gürültü ile birlestirilmis sinyalin PAPR degerini belirlemektedir. Kontrol ve karar birimi (6), belirledigi PAPR degerini üzerinde tanimli PAPR limit degeri ile karsilastirmaktadir. Bulusun bir uygulamasinda karar ve kontrol birimi (6), kullanicilarin degerini belirleyebildigi PAPR limit degeri parametresi içermekte ve sinyalin PAPR degerini ilgili parametre degeri ile karsilastirmaktadir. PAPR degerinin belirli limit degerinin üzerinde olmasi durumunda kontrol ve karar birimi (6), gürültü üretim birimine (3) farkli bir yapay gürültü sinyali üretmesi ve sembol birlestirme birimine (4) ayni OFDM sembolünü yeni bir gürültü sinyali ile birlestirmesi için bildirimde bulunmaktadir. PAPR degerinin limit degerinin altinda olmasi durumunda kontrol ve karar birimi (6), sembol birlestirme birimine (4) yeni sembol almasi için bildirimde bulunmakta ve PAPR degeri limit degerinin altinda olan sinyali iletilmek üzere siraya koymaktadir. The control and decision unit (6) in the system (1), which is the subject of the invention, It is the unit that controls the value and takes action according to the control result. control and The decision unit (6) is combined with the noise it receives in the time domain from the conversion unit (5). determines the PAPR value of the combined signal. Control and decision unit (6), with the PAPR limit value defined above the PAPR value it has determined. compares. In one embodiment of the invention, the decision and control unit (6), Contains PAPR limit value parameter that users can specify and compares the PAPR value of the signal with the corresponding parameter value. PAPR control and decision in case the value is above the certain limit value. unit (6) produces a different artificial noise signal to the noise generation unit (3), and the same OFDM symbol to the symbol combining unit (4) with a new noise signal. notification for merger. Limit value of PAPR value If it is below, the control and decision unit (6) is connected to the symbol combining unit. (4) notifies to receive new symbol and PAPR value is limited It queues the signal below the value to be transmitted.
Bulus konusu sistem (1) sayesinde OFDM tekniginde verimliligi artirmak üzere sinyallerin PAPR degerlerinin düsürülmesi için yapay gürültü kullanimi islemleri gerçeklestirilmektedir. Söz konusu sistemde (l), fiziksel katman güvenligi için kullanilan yapay gürültü ile PAPR degerinin düsürülmesi sayesinde güvenlik ve verimlilik ayni islemler ile saglanmaktadir. Thanks to the inventive system (1), it is aimed to increase the efficiency in OFDM technique. artificial noise use processes to reduce the PAPR values of the signals is carried out. In the system in question (l), for physical layer security Thanks to the artificial noise used and the reduction of the PAPR value, safety and Efficiency is provided by the same processes.
OFDM tekniginde yapay gürültü ile PAPR degerinin düsürülmesini saglayan; -sembol birlestirme birimi (4) tarafindan veri saglama biriminden (2) yeni OFDM sembolünün frekans alaninda (domain) alinmasi (101), -sembol birlestirme birimi (4) tarafindan gürültü üretim biriminden (3) yapay gürültü sinyallerinin frekans alaninda alinmasi (102), -sembol birlestirme birimi (4) tarafindan OFDM sembolünün ve yapay gürültü sinyallerinin birlestirilmesi (103), -sembol birlestirme birimi (4) tarafindan birlestirilen sinyalin dönüstürme -dönüstürme birimi (5) tarafindan birlestirilen sinyalin frekans alanindan zaman alanina dönüstürülmesi ve kontrol ve karar birimine (6) iletilmesi (105), -kontrol ve karar birimi (6) tarafindan zaman alanindaki sinyalin PAPR degerinin belirlenmesi (106), -kontrol ve karar birimi (6) tarafindan sinyalin PAPR degerinin limit degeri ile karsilastirilmasi (107 ), -PAPR degerinin limit degerinden yüksek olmasi durumunda, kontrol ve karar birimi (6) tarafindan gürültü üretim birimine (3) farkli gürültü sinyali olusturmasi için bildirim iletilmesi (108 ), -PAPR degerinin limit degerinden yüksek olmasi durumunda, kontrol ve karar birimi (6) tarafindan sembol birlestirme birimine (4) bir önceki OFDM sembolünün yeni yapay gürültü sinyali ile birlestirmesi için bildirim iletilmesi (109), -bildirimi alan sembol birlestirme birimi (4) tarafindan gürültü üretim biriminden (3) yeni gürültü sinyalinin alinmasi ve bir önceki OFDM sembolü ile frekans alaninda birlestirilmesi (110), -PAPR degerinin limit degerinden düsük olmasi durumunda, kontrol ve karar birimi (6) tarafindan sinyalin iletilmek üzere listeye alinmasi (111), -PAPR degerinin limit degerinden düsük olmasi durumunda, kontrol ve karar birimi (6) tarafindan sembol birlestirme birimine (4) yeni OFDM sembolü almasi için bildirimde bulunmasi (112) adimlarini içeren bir OF DM yöntemi (100). In OFDM technique, which enables the reduction of PAPR value with artificial noise; -new OFDM from the data provisioning unit (2) by the symbol combination unit (4) receiving the symbol in the frequency domain (domain) (101), -artificial by the symbol combining unit (4) from the noise generation unit (3) reception of noise signals in the frequency domain (102), - of the OFDM symbol and artificial noise by the symbol combining unit (4) combining the signals (103), -conversion of the signal combined by the symbol combining unit (4) -time from the frequency domain of the signal combined by the conversion unit (5) field and transmitting it to the control and decision unit (6) (105), -the PAPR value of the signal in the time domain by the control and decision unit (6) determination (106), -with the limit value of the PAPR value of the signal by the control and decision unit (6) compared (107) - In case the PAPR value is higher than the limit value, control and decision different noise signal generation by the noise generation unit (3) by the unit (6) notification for (108) - In case the PAPR value is higher than the limit value, control and decision by the symbol combining unit (4) to the previous OFDM unit (6). forwarding notification to combine the symbol with the new artificial noise signal (109), - by the symbol combination unit (4) receiving the notification from the noise generation unit (3) reception of the new noise signal and frequency with the previous OFDM symbol consolidation in the field (110), - In case the PAPR value is lower than the limit value, control and decision enlisting the signal to be transmitted (111) by the unit (6), - In case the PAPR value is lower than the limit value, control and decision receiving a new OFDM symbol by the symbol combining unit (4) by the unit (6) an OF DM method (100) comprising the steps of reporting (112) for
Bulus konusu yöntem (100) sayesinde, OFDM tekniginde verimliligin artirilmasi için PAPR degeri düsürülmesi için fiziksel katman güvenligi için kullanilan yapay gürültü sinyallerinin kullanimi ile OFDM tekniginde verimlilik ve güvenligin ayni islem adimlari ile gerçeklestirilmesi saglanmaktadir. Increasing the efficiency in OFDM technique by means of the method (100) of the invention Artificially used for physical layer security to reduce the PAPR value for Efficiency and safety are the same in OFDM technique with the use of noise signals. It is provided to be carried out with process steps.
Bulus konusu sistemin (1) ve yöntemin (100) çok çesitli uygulamalarinin gelistirilmesi mümkün olup, bulus burada açiklanan örneklerle sinirlandirilamaz, esas olarak istemlerde belirtildigi gibidir. Various applications of the inventive system (1) and method (100) development is possible and the invention cannot be limited to the examples described herein. essentially as specified in the claims.
Sembol birlestirme birimi (4) tarafindan veri saglama biriminden (2) yeni OFDM sembolünün 101 frekans alaninda (domain) alinmasi j Sembol birlestirme birimi (4) tarafindan gurultu uretim biriminden (3) yapay gurultu sinyallerinin / frekans alaninda alinmasi 4' 103 Sembol birlestirme birimi (4) tarafindan OFDM sembolünün ve yapay gürültü sinyallerinin / birlestirilmesi Dönüstürme birimi (5) tarafindan birlestirilen sinyalin frekans alanindan zaman alanina j dönüstürülmesi ve kontrol ve karar birimine (6) iletilmesi Kontrol ve karar birimi (6) tarafindan zaman alanindaki sinyalin PAPR degerinin belirlenmesi EVET PAPR degeri limit HAYIR degerinden yüksek Kontrol ve karar birimi (6] Kontrol ve karar birimi (6) 111 tarafindan gürültü üretim 108 tarafindan sinyalin iletilmek / birimine (3) farkli gürültü / üzere listeye alinmasi sinyali olusturmasi için bildirim iletilmesi ` 112 Kontrol ve karar birimi (6) j Kontroi ve karar b'r'm' (6) 109 birlestirme birimine (4) tarafindan sembol birlestirme / yeni OFDM sembolü birimine (4) bir önceki OF DM almasi için bildirimde sembolünün yeni yapay gürültü bulunmasi bildirim iletilmesi Bildirimi alan sembol 110 birlestirme birimi (4) tarafindan gürültü üretim sinyalinin alinmasi ve bir önceki OF DM sembolü ile frekans alaninda birlestirilmesi 101 of the new OFDM symbol from the data supply unit (2) by the symbol combination unit (4). receiving (domain) in the frequency domain j By the symbol combining unit (4), artificial noise signals from the noise generating unit (3) / reception in the frequency domain 4' 103 By the symbol combining unit (4), OFDM symbol and artificial noise signals / merging From the frequency domain to the time domain j of the signal combined by the conversion unit (5) converted and transmitted to the control and decision unit (6) Determination of the PAPR value of the signal in the time domain by the control and decision unit (6) YES PAPR value limit NO overvalued Control and decision unit (6] Control and decision unit (6) 111 to transmit / transmit the signal by noise generation 108 by to be listed for (3) different noise / to generate the signal forwarding notification ` 112 Control and decision unit (6) j Control and decision unit (6) to 109 combining units (4) symbol merge / new OFDM symbol unit (4) to receive the previous OF DM new artificial noise of the symbol forwarding notification Symbol receiving the notification 110 combining unit (4) noise generation by reception of the signal and with the symbol OF DM before combining in the frequency domain
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| TR2017/14179A TR201714179A2 (en) | 2017-09-25 | 2017-09-25 | A SYSTEM AND METHOD WITH ARTIFICIAL NOISE AND PAPR REDUCTION IN OFDM TECHNIQUE |
| PCT/TR2018/050265 WO2019059864A2 (en) | 2017-09-25 | 2018-05-25 | A system and method for papr reduction by means of artificial noise in ofdm technique |
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