alternating sign binary representation

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9110 = 10110112 = 2⁶+2⁴+2³+2¹+2⁰ = 2⁷-2⁶+2⁵-2³+2²-2⁰
How is called this binary representation where sign is alternating? For all natural numbers this representation is unique. Which are its main properties? Some references?
The way to obtain this representation from usual binary representation is simple:
   1 0 1 1 0 1 1 02 (twice 9110)
- 0 1 0 1 1 0 1 12 (          9110)
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   1-1 1 0-1 1 0-1 (          9110)