Innowireless Co., Ltd.

Yonghoon Lim

Jinsoup Joung

Seunghwan Ji

Byungkwan Jang

Seungik Yang

Soocheol Kyeong

Jaesung Lee

Kyeongmin Ha

Disclosed herein is a method of detecting a physical downlink control channel (PDCCH) in a long-term evolution (LTE) system. In this method, one is selected from among possible PDCCH formats for received base station signals, and a signal corresponding to the length of the selected PDCCH format is retrieved. Thereafter, one is selected from among one or more of possible DCI formats that have not been selected yet. Thereafter, decoding is performed using the retrieved signal and the selected DCI format. Finally, a remainder is obtained by dividing the decoded signal by a cyclic redundancy check (CRC) pattern, and the remainder is stored as RNTI information, along with the selected DCI and the DCI format.

Method of detecting physical downlink control channel in long-term evolution system

An apparatus and a method of compensating for an I/Q imbalance in a direct up-conversion system prevents the performance of the system from being deteriorated by efficiently compensating for an I/Q timing skew, an I/Q phase imbalance, and an I/Q gain imbalance by using a characteristic of an OFDM scheme in an Orthogonal Frequency Domain Multiple (Access) (OFDM(A)) system using a direct up-conversion scheme. According to the apparatus and the method of compensating for an I/Q imbalance in the direct up-conversion system of the present invention, an OFDM(A) system using a direct up-conversion scheme may efficiently compensate for I/Q timing skew, I/Q phase imbalance, and I/Q gain imbalance by using a characteristic of an OFDMA scheme, so that a performance of the system is prevented from being deteriorated.

Apparatus and method of compensating for I/Q imbalance in direct up-conversion system

The present invention relates to an apparatus and a method for eliminating I/Q offset in a receiver of a SC-FDMA system which improves performance of the system by accurate measurement and cancellation of I/Q offset in a receiver of a SC-FDMA system operating in a 3GPP LTE uplink. An apparatus for eliminating I/Q offset in a receiver of the SC-FDMA system constituting the receiver of the SC-FDMA system includes: a linear interpolation channel estimation unit for estimating channel using demodulation reference symbol (DMRS) that is a training sequence (X) corresponding to the discrete Fourier transformed signal (Y) that has passed through frame sync acquisition, frequency compensation and cyclic prefix elimination; a signal regeneration/cancellation unit for calculating I/Q offset (D=Y&#x2212;Y') by subtracting the discrete Fourier transformed signal (Y) from the ideal discrete Fourier transformed signal (Y&#x2032;=H&#x2032;X) generated by using channel coefficient (H&#x2032;), that is an output of the linear interpolation channel estimation unit, and the DMRS that is the training sequence (X); and an I/Q offset measurement/cancellation unit for generating VQ offset-free signal (Y=Y&#x2212;D&#x2032;) by subtracting I/Q offset (D&#x2032;) having corrected phase and power of the VQ offset (D=Y&#x2212;Y&#x2032;) from the discrete Fourier transformed signal (Y).

Apparatus and method for I/Q offset cancellation in SC-FDMA system

The present invention relates, in general, to a method of decoding a Physical Broadcast Channel (PBCH) in a Long Term Evolution (LTE) system and, more particularly, to a method of detecting a Master Information Block (MIB) contained in a PBCH.

Method of decoding physical broadcast channel in long term evolution system

This invention relates to an automatic detection apparatus for UL/DL configuration in LTE-TDD signal and the method thereby for automatically detecting the UL/DL configuration number of an LTE-TDD signal without a decoder by using a simple structure. An automatic detection apparatus for UL/DL configuration in LTE-TDD signal comprises: a signal receiving unit for receiving an LTE-TDD RF signal and converting the LTE-TDD RF signal into a LTE-TDD baseband signal; a signal extracting unit for extracting a cell-specific reference signal for each subframe length in one frame length of the LTE-TDD baseband signal received from the signal receiving unit; a signal power measurement unit for measuring the power of the corresponding subframe reference signal according to the cell-specific reference signal received from the signal extracting unit; and an UL/DL configuration determination unit for determining whether the corresponding subframe is a DL subframe or an UL subframe according to the comparison result of the power of the corresponding subframe reference signal measured in the signal power measurement unit with a predetermined reference value, and determining the UL/DL configuration number for the corresponding frame based on the subframe number determined as described above. In the above configuration, it is characterized in that the predetermined reference value is the noise power without any LTE-TDD signal.

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Seoul, South Korea

Yonghoon Lim