Group US Army military portrait including Dr. William Levison (top row, third from left); Schofield Barracks, Hawaii Portraits Groups Men

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World War I military portraits of Arthur Neustadt.

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Military portraits of Erich Gustav Baum as a solider during World War I Portraits Men

Includes photographs of Erich Gustav Baum with a bicycle, with other unidentified soliders, and wearing an Iron Cross

Martin Goldschmidt in Prussian military uniform Portraits Men

Born 1879?; Married September 2, 1903 in Leipzig to Paula Harmelin, father of Henry H. Goldschmidt Gould and Ruth Augusta Beatrice Goldschmidt

Schwabacher, Benno Military; Portraits Groups

Correspondence BS to Joseph Ortweiler

Hedwig 0ttow, Festungslazarett Koenigsberg military portraits women

Hedwig Ottow later married Dr. Max Bejach

Studio portrait of five Heimann brothers in military uniform during World War I.

l-r: Albert Heimann, Leopold Heimann, Nathan Heimann, Hermann Heimann and Max Heimann; Sons of Julius and Mina Heimann

Reverse Channel Training For Reciprocal Mimo Systems With Spatial Multiplexing

This paper investigates the problem of designing reverse channel training sequences for a TDD-MIMO spatial-multiplexing system. Assuming perfect channel state information at the receiver and spatial multiplexing at the transmitter with equal power allocation to them dominant modes of the estimated channel, the pilot is designed to ensure an stimate of the channel which improves the forward link capacity. Using perturbation techniques, a lower bound on the forward link capacity is derived with respect to which the training sequence is optimized. Thus, the reverse channel training sequence makes use of the channel knowledge at the receiver. The performance of orthogonal training sequence with MMSE estimation at the transmitter and the proposed training sequence are compared. Simulation results show a significant improvement in performance.

Bert Werner Military; Portraits

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Dr. Bernhard Bardach clinking glasses with unidentified officers and civilian; Isola Military; Portraits

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Dr. Bernhard Bardach in trench with unidentified soldiers Military; Portraits

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Dr. Bernhard Bardach with unidentified officers Military; Portraits

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Dr. Bernhard Bardach at dining table with unidentified officers Military; Portraits

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