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This paper describes a fully integrated 65nm CMOS 2×2 MIMO multi-band LTE RF transceiver for small cell (femtocell) base stations with frequency support from 680MHz to 6GHz. The transceiver features highly integrated RF front-ends including single-ended LNAs and drive amplifiers with total 32 individual RF I/O pins. The receiver shows NF of 2.9∼5.2dB, HP3 of >-2dBm, and HP2 of >48dBm over the...
In this paper, we present a coordinated multicast scheme via a relay station (RS) over a single frequency network (SFN). According to the type of feedback information delivered from the RS to the adjacent base stations (BSs) involved in the coordinated multicast, the schemes are classified into the phase coordination multicast based on the RS (PCMR) and the vector coordination multicast based on the...
In this paper, we consider an environment where a number of users are geographically bounded and analyze a performance of multicast transmission via a relay station. Generally, common data rate of a conventional multicast system is determined by a minimum link capacity between a base station and multiple users. However, common data rate of the multicast system based on relay station is determined...
To generate multiple orthogonal carriers in an OFDM (orthogonal frequency division multiplexing) symbol, an FFT (fast Fourier transform) and IFFT (inverse FFT) pair is utilized at the transmitter and the receiver, respectively. Thus, it may be difficult for an MN (mobile node) to reconstruct signals received from several BSs (base stations), when single FFT module is used. Moreover, when a GPS (global...
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