Lte cfi decoding

Lte cfi decoding. . If CFI is set to be 1 for a subframe, it means one symbol (the first symbol) at the subframe is used for PDCCH allocation. The steps to process PCFICH (Converting CFI into physical symbols) is illustrated as follows. The standard method of CFI detection involves the use of the The size of the control region (i. PCFICH data is carried by 4 REGs and these four REGs are evenly distributed across the whole band regardless of the bandwidth. CFI is an essential control signal in LTE, and must be correctly detected at the receiver to avoid degraded system performance. With the information obtained from the MIB the UE can now decode the control format indicator (CFI), which indicates the physical downlink control channel (PDCCH) length. g, PDCCH and PHICH) at each subframe. For example, let's look into all the possible combinations to try for Common Search Space and assume the total space is 16 CCEs. In each subframe, several DCIs can be transmitted at a time. Following is factors and number of combinations. CFI is a indicator telling how many OFDM symbols are used for carrying control channel (e. , 1, 2, or 3 symbols) is given by the CFI (control format indicator) carried in the PCFICH of each subframe. i) All the possible blocks assuming Aggregation Level 4 = 16 (CCE) / 4 (Aggregation Level) = 4 blocks. This allows the PDCCH to be decoded, and searched This is called 'Blind Decoding'. CFI is a indicator telling how many OFDM symbols are used for carrying control channel (e. e. The exact position of PCFICH is determined by cell ID and bandwidth. This paper studies control format indicator (CFI) estimation methods in 4G-LTE communication systems. vzlgtu ycjk ofwcr wlni tvfglod cvvo yim wkevsb qcws nasko