Column Control DTX

Solutions for MIMO RF Test and Debug

Application Notes

Multiple-Input Multiple-Output (MIMO) is a signal transmission technique promising higher data rates for a single user using two or four streams of data transmitted with multiple antennas. Multiple antennas transmit the data on the same frequency and at the same time without interfering with one another. While single antenna implementations of Orthogonal Frequency Division Multiple Access (OFDMA) signal formats such as Mobile WiMAX™ and 3GPP Long Term Evolution (LTE) can enable increased data rates, even higher data rates can be realized by doubling or even quadrupling the number of antennas in the implementation, as is the case with four-channel MIMO. Because of such benefits, MIMO has become a key technology of emerging 4G wireless standards. One such standard is 3GPP Long Term Evolution (LTE), the evolution of 3GPP UMTS. LTE will provide peak rates of 326.4 Mbps (downlink) and 86.4 Mbps (uplink) for a 64QAM 4x4 MIMO configuration (Refer to the book“LTE and the Evolution to 4G Wireless: Design and Measurement Challenges,” Table 1.4-1). Currently, most work with LTE focuses on single antenna implementations of MIMO, but as LTE evolves, such designs may ultimately migrate to two- and four-channel MIMO to take advantage of the higher data rates possible.

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Column Control DTX