Ambitious new tech start-ups, inventors and budding entrepreneurs only have one month left to enter the Cambridge Wireless Discovering Start-Ups 2011 competition and get the chance to pitch to leading venture capitalists, angels and industry investors. Representatives from Microsoft, RIM, Nokia, Vodafone Ventures, Qualcomm Ventures, Innovacom, Broadcom, Orange and ARM are among those lining up to pick the winners and provide expert advice.