{"search_session":{},"preferences":{"l":"en","queryLanguage":"en"},"patentId":"181-172-044-282-850","frontPageModel":{"patentViewModel":{"ref":{"entityRefType":"PATENT","entityRefId":"181-172-044-282-850"},"entityMetadata":{"linkedIds":{"empty":true},"tags":[],"collections":[{"id":10771,"type":"PATENT","title":"University of Southern California - Patent Portfolio","description":"","access":"OPEN_ACCESS","displayAvatar":true,"attested":false,"itemCount":8387,"tags":[],"user":{"id":91044780,"username":"Cambialens","firstName":"","lastName":"","created":"2015-05-04T00:55:26.000Z","displayName":"Cambialens","preferences":"{\"usage\":\"public\",\"beta\":false}","accountType":"PERSONAL","isOauthOnly":false},"notes":[{"id":8241,"type":"COLLECTION","user":{"id":91044780,"username":"Cambialens","firstName":"","lastName":"","created":"2015-05-04T00:55:26.000Z","displayName":"Cambialens","preferences":"{\"usage\":\"public\",\"beta\":false}","accountType":"PERSONAL","isOauthOnly":false},"text":"
measuring a channel state in the time domain with the base station;\n
quantizing the measured channel state in the time domain; and\n
including the quantized channel state information in a reference signal and transmitting the same to the base station."],"number":1,"annotation":false,"title":false,"claim":true},{"lines":["The method of claim 1, wherein,\n
in the quantizing,\n
a number of quantization bits and a quantization region for each path gain are differently set according to a statistic characteristic of the path gain for each channel path."],"number":2,"annotation":false,"title":false,"claim":true},{"lines":["The method of claim 2, wherein\n
the quantizing includes:\n
respectively allocating the number of quantization bits according to the statistic characteristic of the path gain for each channel path; and\n
setting a quantization region based on the number of quantization bits."],"number":3,"annotation":false,"title":false,"claim":true},{"lines":["The method of claim 3, wherein\n
the respectively allocating the number of quantization bits further includes:\n
defining a first distortion value with an average value of a squared quantization error of the time domain channel coefficient; and\n
determining the number of quantization bits for quantizing a channel coefficient of a channel path that is needed for a case in which the first distortion value is less than a predetermined maximum distortion value."],"number":4,"annotation":false,"title":false,"claim":true},{"lines":["The method of claim 3, wherein\n
the setting of a quantization region includes:\n
determining a number of quantization regions based on the number of quantization bits;\n
uniformly setting a quantization interval so as to minimize the second distortion value; and\n
finding a quantization boundary value and a middle value of the quantization region from the quantization interval."],"number":5,"annotation":false,"title":false,"claim":true},{"lines":["The method of claim 3, further including\n
simultaneously finding the number of quantization bits and the quantization interval for minimizing the second distortion value, and using the same as a number of quantization bits and a quantization interval."],"number":6,"annotation":false,"title":false,"claim":true},{"lines":["The method of claim 6, wherein\n
the number of quantization bits and the quantization interval are computed when the statistic characteristic of a path gain for each channel path is changed or for each predetermined period, and computed results are transmitted to the base station."],"number":7,"annotation":false,"title":false,"claim":true},{"lines":["The method of claim 1, wherein\n
the measuring of a channel state includes:\n
estimating a channel in the frequency domain; and\n
taking an inverse fast Fourier transform of a value of the estimated channel in the frequency domain to acquire the time domain channel coefficient."],"number":8,"annotation":false,"title":false,"claim":true},{"lines":["A method for a base station receiving feedback information from a terminal to acquire a channel state from the base station to the terminal, comprising:\n
transmitting a reference signal to the terminal through a multipath communication channel;\n
receiving quantized channel state information in the time domain from the terminal; and\n
checking a channel state in the frequency domain from the received channel state information in the time domain."],"number":9,"annotation":false,"title":false,"claim":true},{"lines":["The method of claim 9, further including\n
receiving a number of quantization bits and a quantization interval of a path gain for each channel path from the base station when the channel state is changed or according to a predetermined period."],"number":10,"annotation":false,"title":false,"claim":true},{"lines":["The method of claim 10, wherein the method includes\n
receiving feedback information including quantized channel state information in the time domain from the terminal, analyzing the feedback information based on the number of quantization bits and the quantization interval of the path gain for each channel path, and acquiring quantized time domain channel state information."],"number":11,"annotation":false,"title":false,"claim":true}]}},"filters":{"npl":[],"notNpl":[],"applicant":[],"notApplicant":[],"inventor":[],"notInventor":[],"owner":[],"notOwner":[],"tags":[],"dates":[],"types":[],"notTypes":[],"j":[],"notJ":[],"fj":[],"notFj":[],"classIpcr":[],"notClassIpcr":[],"classNat":[],"notClassNat":[],"classCpc":[],"notClassCpc":[],"so":[],"notSo":[],"sat":[]},"sequenceFilters":{"s":"SEQIDNO","d":"ASCENDING","p":0,"n":10,"sp":[],"si":[],"len":[],"t":[],"loc":[]}}