摘要:
A cable management device is provided, which includes a first leg and a second leg connected by a connecting crown member. A first protrusion extends from the first leg. A second protrusion extends from the second leg. The first leg and the second leg both include an aperture. The cable management device includes passageway defined by an inner-surface of the first leg, an inner-surface of the second leg, and an inner-surface of the connecting crown member. The passageway is operable to hold a cable.
摘要:
A cable management device is provided, which includes a first leg and a second leg connected by a connecting crown member. A first protrusion extends from the first leg. A second protrusion extends from the second leg. The first leg and the second leg both include an aperture. The cable management device includes passageway defined by an inner-surface of the first leg, an inner-surface of the second leg, and an inner-surface of the connecting crown member. The passageway is operable to hold a cable.
摘要:
A method for transmitting information by using Cyclic Prefix (CP) timeslots includes a transmitter transmitting CP information at a portion of CP timeslots when transmitting the timeslots or transmitting no CP information at CP timeslots when transmitting the CP timeslots. A method for using CP timeslots effectively and an apparatus for using CP timeslots are also disclosed.
摘要:
In a method for forming TDD MIMO downlink beams, a BS receives an index of a codebook element from a mobile terminal. The codebook element refers to a codebook element whose correlation value has a greatest modulus value among correlation values that are calculated by the mobile terminal and are about correlation between the codebook element and a channel corresponding to a non-transmitting antenna of the mobile terminal. The BS calculates a channel vector corresponding to the non-transmitting antenna of the mobile terminal. The BS calculates channel vectors of the transmitting antennas of the mobile terminal, and performs SVD to determine a best transmitting precoding matrix.
摘要:
Disclosed herein is a system and method for downlink beamforming that takes into account imperfect channel state information (CSI) at the transmitter when determining the steering vector used in the beamforming process. The steering vector is calculated to increase the ratio of the average power of a desired signal component to the sum of the interference power of other wireless terminals, referred to as the signal-to-leakage ratio. By accounting for imperfect CSI when calculating the steering vector, the bit-error rate for a given signal-to-noise ratio is decreased. Also disclosed is a power allocation method that improves performance of the system by increasing the signal-to-interference-plus-noise ratio for all of the wireless terminals currently communicating with the base station. The power allocation similarly decreases the bit-error rate for a given signal-to-noise ratio, especially at high signal-to-noise ratios.